COLEOPTERA. 141 EKCHOMIJS Mots.
E. flavidllS n. sp. — Form as in ventriculus. Color throughout evenly flavo-testaceous, with a slightly reddish tinge ; head dark piceous-brown ; antennae pale toward base, dark piceous-brown toward tip, apical joint slightly paler toward tip. Head much broader than long, strongly detlexed ; front feebly convex, feebly strigose and nearly vertical, nearly semicircularly rounded froin the front margin around the sides and base, and in contact with a similarly rounded emargination in the pronotum ; antennae but very slightly longer than the width of head, first joint more than twice as long as wide, cylindrical, second thinner, conoidal, base narrow, two- thirds as long as the first, third shorter than the second, very thin, conical, fourth very small, wider than long, first four joints glabrous, remaining joints increasinginwidth,slightlycompressed,roughlyandfinelyasperate,densely and very finely pubescent, and coarsely and sparsely setose, fifth but very slightly wider than long, tenth nearly one-half wider than long, eleventh distinctly longer than wide, obtusely rounded at tip, ovoidal. Prothorax slightly more than twice as wide as long ; apex from above transverse and straight, three-fifths as long as the base which is also transverse and straight ; sides strongly and exactly evenly rounded throughout, being almost an exact arc of a circle, the tangents drawn to it at the base are not parallel but very feebly divergent anteriorly ; basal angles from above right and not at all rounded, viewed laterally narrowly rounded and slightly acute; disk very strongly convex, sti"ongly margined at the sides, polished, very minutely evenly and rather sparsely punctate. Elytra at base as wide as the contiguouspronotum;sidescontinuousindirectionwiththepronotaltangents at the basal angles, or very feebly convergent posteriorly, slightly arcuate ; together broadly roundly and extremely feebly emargijiate behind ; disk about one-third longer than the pronotum and nearly one-half wider than long, very convex, shining, finely and roughly undulated or rugulose, also finely and evenly punctate ; punctures larger than those of the pronotum, sometimes in broken longitudinal aggregations. Abdominal segments decreasingvery rapidly in width, first narrower than the contiguous elytra ; border narrow and inconspicuous ; surface shining, strongly convex, covered very sparsely with excessively short fine and recumbent cinereous liairs, finely and regularly imbricated, imbrications longer than wide, acute, finely reticulated ; each segment beneath bears a short stout intensely black seta near the apex and the lateral edge; the sixth segment having two longer ones on each side. Legs short and stout ; posterior tibiae having two stout spines on the inner side, and terminated by several short irregular spines, and a few close stout spinules, not darker ; tarsi cylindrical, nearly glabrous, first joint nearly as long as the next three together. Length (contracted) 2.0mm.
Jenkintown, near Philadelphia, 4.
The description is taken from the female, and the middle lobes of the sixth ventral segment are terminated by four stout closely placed arcuate spinules ; the dorsal teeth are as in ventriculus except that Cont. Fart II. 6 January, 1885.
142 NORTH AMERICAN the middle teeth are rather less slender and project further beyond the lateral ones than in that species. At first glance this species, es| ecially it" represented by a single specimen, would be pronounced witiiout doubt a pale specimen of ventricvlus^ but when examined carefully it presents so many points of departure from that species irrespective of color, as to leave no doubt whatever of its distinctness. The principal differences are in the color, structure of the antennae, elytral sculpture, abdominal imbrication and slight differences in the sexual characters. In ventricuhis the color is invariably intense black througliout, the fourth joint of the antennae is fully as long if not longer than wide, and the outer joints are more transverse in j)roportion; the elytral sculpture is smoother, although more strongly punctate, and the imbrication of the abdomen is much more irregular. This species is evidently not tiie form alluded to by Dr. Horn, and represented by the paler specimens of ventriculus, the paleness being apparently due to immaturity ; the black abdominal setae and dark piceous color of the head alone refute this view, there being not a particle of variation in the four specimens before me. COIVIIRUS Steph.
C. versicolor n. sp. — Form rather robust, very convex. Pubescence ratber coaise and sparse, yellowish-cinereous ; head and prothorax dark reddish-brown, base of the latter paler ; elytra at base reddish-testaceous, the color extending slightly along the elytra, remainder of tlie disk piceousblack ; abdomen very dark piceous-brown ; under surface of the body very pale reddish-testaceous, abdomen dark brown ; first three joints of antennae pale testaceous, four to ten dark brown, eleventh reddish-testaceous. Head nearly twice as wide as long, moderately convex, highly polished, broadly rounded behind, strongly deflexed ; emargination of pronotum for its receptionmuch more than twice as wide as long, broadly rounded at bottom, sides near the apical angles parallel ; epistoma very slightly wider than long, tinely rugulose, finely and sparsely punctate, sides nearly parallel and straight, apical margin broadly arcuate ; antennae nearly as long as the head and prothorax together, extremely strongly compressed toward tip, the last joint being very thin, second joint much shorter than the third, third to fifth equal in length, the first two equal, thinnest, cylindrical, the fifth bro.ader toward tip, joints six to ten shorter, sub-equal in length, increasing in width, slightly narrowed toward base, sides straight, the former nearly twice as long as wide, the latter slightly shorter than the tenth and but very slightly longer than wide, eleventh elongate, oval, obtusely rounded at tip, much shorter than the two preceding together. Prothorax widest at the base where it is a little more than one-third wider than long; sides very evenly and moderately rounded ; apex much less than one-half as long as the base, very feeldy arcuate, the latter straight ; basal angles from above slightly acute and not at all rounded, laterally slightly produced, rather strongly
COLEOPTERA. 143 and very evenly rounded ; sides very feebly sinuate toward the apical angles which are very narrowly rounded ; disk very convex, highly polished, excessivelyminutelytransverselyandfeeblystrigose,notpunctateexceptthe impressions left after the denudation of the hair. Elytra at base as wide as the contiguous pronotum ; sides moderately convergent posteriorly and feebly arcuate; together nearly transversely truncate behind; disk very slightly wider than long, strongly convex, shining ; sculpture finely feebly and evenly imbricate, imbrications wider than long, finely reticulate ; disk also distinctly and minutely aspero-punctate, an asperate setigerous puncture at the base of each imbrication. Abdomen at base very slightly narrower than the elytra, pale at tip, finely pubescent, having numerous erect coarse black spinous setae at the sides. Legs moderate, pale reddish-testaceous ; feinora and middle tibiae flattened, the latter fimbriate at tip and for one-fourth the length along the inner edge with erect stout closely placed black spinules, having also one long stoiit terminal spur, and one smaller erect spine on the inner edge near the middle ; anterior tarsi broadly dilated, spongy-pubescent beneath ; anterior tibiae fimbriate along the outer edge fcom base to apex with stout black closely set spinules ; mesosternum very narrowly and strongly carinate ; presternum having a median tuberculation bearing five long slender parallel setae, the middle one the longest. Length (strongly contracted) 2.4 mm.
Jenkintown, near Philadelphia, 1.
Tliis species belongs immediately after crassus in the catalogue, and may be distinguished from that species by its much smaller size, coloration, and shape of the epistuma, it being very strongly transverse, transversely truncate anteriorly with the sides parallel and slightly sinuate. Tiie two species also differ in the structure of the antennae, in which the tenth joint is not shorter than the ninth, is less strongly compressed, and is much longer than wide in crassus; also in the latter the eleventh joint is more abruptly compressed, is extremely thin and two and one-half times as long as wide. The emargination of the pronotum for the head in crassus is much shallower, and the sides near the anterior angles are very widely divergent. The beautiful fimbriation along the edge of the anterior tibiae which also exists to a less marked degree in crassus, is a character which does not seem to have been noticed, as may perliap.s also be the case in regard to the prosternal spines.
C initoricatus n. sp. — Form very convex, rather slender. Color piceous-black, posterior margin of the pronotum very narrowly paler from diaphaneity ; abdomen paler, reddish-fuscous, paler toward tip ; pubescence very fine, rather dense, recumbent, almost equally distributed over the entire dorsal surface. Head wider than long, polished, very minutely sparsely and evenly punctate, slightly more strongly so anteriorly ; eyes rather small and slightly prominent ; antennae scarcely as long as the width of head, slender and paler toward base, piceous-brown, apical joint very pale flavate, penul-
144 NORTH AMERICAX tiuiatc (larkpr not very densely pubescent, first joint slender, very slightly thicker than the second and but one-fourth longer, more than three times as long as wide, second slender, sub-cyliudrical, three-fourths as long as the third which is very slender, slightly narrowed toward base, third to fifth slightly decreasing in length and increasing in thickness, the latter about twice as long as wide and almost cylindrical, sixth to tenth nearly equal in length, shorter than the lifth, increasing in width, the former slightly longer than wide, the latter one-third wider than long, sides moderately convergent toward base, basal angles broadly rounded, eleventh nearly as long as the ninth and tenth together, slightly wider than the tenth, somewhat abruptly constricted toward the tip whicji is obliquely produced and acutely rounded, outer joints somewhat distinctly compressed ; third joint of the maxillary palpi much longer and thicker than the second, third thin, conical, shorter than the second. Prothorax widest at one-fourth the length from the base where it is about one-third wider than long ; sides not strongly arcuate ; apex from above rather strongly arcuate, about one-half as long as the base with the angles rounded and obsolete, basal angles slightly produced, right, and not rounded from above, slightly obtuse viewed laterally and not rounded ; base transverse and straight ; pronotum not punctate except in the minute impressions left by the denuded pubescence, transversely very minutely and feebly strigose. Elytra at base very slightly narrower than the pronotum ; sides feebly convergent posteriorly and slightly arcuate, apical angles rounded broadly behind ; together transversely and just visibly emarginate behind; inner apical angles narrowly rounded; disk broadly convex, very slightly wider than long, about as long as the pronotum, shining, densely finely and feebly imbricate, imbrications slightly longer than wide, coarsely reticulate, very minutely punctato-asperate. Abdomen at base as wide as the contiguous elytra, having a very few short, black setae along the sides, and long black prominent setae on the sixth segment, excessivelyfinely alutaceous. Legs rather long and slender, dark reddishtestaceous ; middle femora with a single long stout erect spine on the lower edge near the tip ; middle tibiae with a long stout and a second small slender terminal spine, also fimbriate at tip with short very robust equal spinules, pale in color. Length (somewhat extended) 3.3 mm.
Staten Island, New York, 1 9.
The sixth ventral segment is narrowly ami roundly produced in the middle, the edge of the almost semicircular produced portion bearing six equal and stout porrected spines which are parallel, there is also a very small obtuse projection of the edge at each side which bears an extremely long black seta ; dorsal quadridenfale, middle teeth projecting slightly beyond the lateral, acute ; middle notch less deep than the lateral ; lateral teeth each bearing three stout black discal setae, the terminal two very long, the middle pair each one, much siiorter; each tooth is prolonged posteriorly in a stout porrected pale seta. The species belongs inimediately alter pubescens in the catalosrue.
COLEOPTEUA. 145 It will be noticed that there is a very marked difference in the structure of the antennae in the present group and tliat containing crassns and versicolor.
C. OCCUltus n. sp. — Form rather robust, oval. Color black ; elytra near the hiiiueri sliglitly reddish, and also paler and reddish narrowly ah)ng the apices ; pronotum much paler in a narrow border along the base ; abdomen piceous-black, apices of the segments narrowly trauslucent and bright fulvous by transmitted light, scarcely paler by reflected light, terminal segment not paler ; pubescence rather sparse, coarse and somewhat unevenly distributed, pale yellowish-cinereous. Head much wider than long, rather convex, highly polished, very feebly and minutely punctulate ; eyes small, not prominent; antennae slightly shorter than the head and prothorax together, two basal joints pale testaceous, remainder dark piceous-brown, terminal joint paler, joints rather strongly compressed toward tip, basal joint rather robust, two and one-half times as long as wide, narrowed toward base, bearing two short black setae near the tip, second slightly more slender, oval, third scarcely as long as the second, very slender, narrowed toward base, fourth slightly shorter and wider than the third, slightly more than twice as long as wide, much broader at base than the third, joints five to ten decreasing very slightly in length a7id increasing in width, the former very slightly shorter than the fourth, about two-thirds longer than wide, the latter about as wide as long, sides rather strongly convergent to the bases, basal angles very slightly rounded, eleventh distinctly shorter than the ninth and tenth togetlier, scarcely more than one-half longer than wide, feebly constricted near the tip which is obtusely but not appreciably obliquely rounded. Prothorax widest at the base where it is scarcely one-fourth wider than long ; sides very evenly and rather strongly arcuate ; apex broadly and distinctly arcuate, very slightly more than one-half as long as the base which is broadly and feebly arcuate and feebly sinuate toward the basal angles : the latter, viewed laterally, strongly obtuse and rather broadly rounded ; sides straight toward the apical angles which are nari'owly rounded ; disk very strongly convex, highly polished, finely evenly and very distinctly punctato-asperate, intervals transversely and very minutely strigate. Elytra at base about as wide as the pronotum ; sides feebly convergent posteriorly, slightly arcuate near the humeri, straight near the apices ; together broadly triangularly and feebly emarginate behind ; disk shining, strongly convex, sculpture coarsely and obscurely imbricate, imbrications broader than long, finely and distinctly reticulated, each with a minute but distinct and strongly asperate puncture at base. Abdomen very convex, shining, sculptured like the elytra, iuibrications obscure, segments smoother and less punctate toward the apices ; along the sides there are a few short erect black setae, and a cluster of about ten larger and longer ones bristling from the posterior segment ; under surface much more coarsely and closely punctate. Legs rather slender, dark reddish-testaceous ; middle femora with four erect spines along the lower edge near the tip, the penultimate much the longest ; posterior femora with three such spiiies, the middle one the longest; middle tibiae fimbriate at tip with short equal closely set spinules, terminated by a single very robust
146 NORTH AMERICAN spine, liaving at the middle of its length one or two interior and two exterior stout oblique spines ; anterior tarsi strongly dilated ; corresponding coxae strongly globose, dark brown in color, surface coarsely imbricate. Length (contracted) 2.8 mm.
District of Columbia, 1.
It may be possible that tliere is a second smaller spine at the apex of the middle tibiae, but it is not visible in the type specimen. It appears to belong immediately after bisignatus. The structure and shape of the pronotum and elytra in many species of the present genus call to mind very vividly several forms of Tricliopteryx on a C. corticola n. sp. — Form rather slender. Color piceous-black ; elytral humeri scarcely distinguishably reddish ; abdomen not paler except at- tip and by transmitted light ; pubescence rather dense, short and coarse, very pale yellowish, more dense and conspicuous on the abdomen. Head much wider than long, rather convex, highly polished, very minutely punctate, punctures being nearly com])letely filled by the hairs ; sides of the contiguousemargination of the pronotum nearly parallel at the apical angles viewed longitudinally ; antennae robust, scarcely as long as the head and prothorax together, first two joints translucent, dark tlaVo-testaceous, eleventh opaque, pale tiavate, remainder piceous-black, basal joint rather robust, narrowed toward base, scarcely more than twice as long as wide, second but very slightly shorter and thinner, oval, third as long as the first, slightly thinner than the second, narrowed toward base, four to ten decreasing very gradually in length and increasing in width, the former about three-fourths as long as the third, scarcely two-thirds longer than wide, the latter one-fourth wider than long, sides of all very feebly convergent toward the base, nearly straight, basal angles feebly rounded, eleventh very abruptly pale, scarcely one-third longer than wide, oval, very feebly constricted at tip which is obliquely and obtusely rounded, outer joints rather strongly compressed, basal joints with two long setae above near the tips, outer joints coarsely setose and finely pubescent. Prothorax widest at one-fourth the length from the base where it is nearly two-thirds wider than long; sides moderately arcuate; apex broadly and feebly arcuate, sinuate near the apical angles, fully tiiree-fifths as long as the base which is broadly and feebly arcuate ; basal angles from above obtuse and not rounded, viewed laterally obtuse, very slightly produced and very slightly rounded, sides almost straight toward the apical angles which are right and not at all rounded ; disk very strongly convex, polished, minutely evenly and rather distantly punctato-asperate, interspaces very minutely and feebly strigato-reticulate. Elytra at base slightly narrower than the pronotum ; sides feebly convergent posteriorly, rather distinctly arcuate near the humeri, straight toward the apical angles which are rounded ; together nearly transversely truncate behind ; inner apical angles slightly rounded ; disk very strongly convex, shining, slightly wider than long and distinctly longer than the pronotum ; sculpture strongly rather finely and somewhat distinctly imbricate, imbrications as wide as
COLEOPTERA. 147 long, finely and obscurely reticulate, each having at base a fine but very distinct asperate puncture. First abdominal segment much narrower than the contiguous elytra ; surface more finely and densely punctat<^ than the elytra, feebly shining through the very dense coarse pubescence, having along the sides a few rather small erect black setae. Legs moderate ; coxae and femora dark reddish-brown ; tibiae and tarsi distinctly paler, reddishtestaceous ; spinules of the fimbriate row along the outer edge of the anterior tibiae short, equal, contiguous and very pale in color ; anterior tarsi strongly dilated toward base, densely pubescent beneath ; middle tibiae slender, fimbriate at tip with short equal pale spinules, als,o having a rather long terminal spine and a second much shorter one, having at the middle of its length two small oblique inner and two outer spines, also at one-third the length from the apex two inner and one or two similar outer spines. Under surface of the body dark piceous -brown. Length (contracted) 2.3 mm. Jenkintown, near Philadelphia, 2 S • The description is taken from a male while that of occnltus is drawn from the female ; the differences noted in the shape of the pronotnm, together with the structure of the middle tibiae are too great to be accounted for by sex, although it may be possible that the lateral spines alluded to are not altogether constant. It appears to belong near pubescens in the tables.
C setifer n. sp. — Form rather slender, very convex. Color of head and prothorax black, basal margin of the latter paler ; elytra dark piceous-black, paler and reddish at the base, especially near the middle of each, also narrowlypaler at the apices ; abdomen reddish-fuscous ; pubescence very fine and moderately dense, very short and recumbent, cinereous. Head rather small, convex, polished, very sparsely pubescent; eyes very coarsely reticulated; antennae not as long as the head and prothorax together, very strongly compressed toward tip, basal joints dark piceo-testaceous, paler toward tip, joints two to seven nearly piceous-black, basal joint sub-cylindrical,about two and one-half times as long as wide, second thinner, nearly cylindrical, scarcely two-thirds as long as the first, three-fourths as long as the third which is thinner and narrowed toward base, third and fourth equal, fifth equal in length, slightly thicker and less strongly narrowed toward base, nearly three times as long as wide, joints six to ten slightly shorter, equal in length, increasing in width, the former nearly one-half longer than wide, the latter about as wide as long, eleventh about one-half longer than wide, oval, obliquely and rather obtusely acuminate at tip. Prothorax about one-third wider than long; sides very evenly and almost circularly arcuate throughout, nearly parallel for a short distance from the base ; apex broadly arcuate, nearly three-fifths as long as the base which is broadly and very feebly arcuate ; basal angles from above slightly obtuse and not rounded, viewed laterally they are obtuse and narrowly rounded ; disk very convex, highly polished, impuuctate except the scars left by fallen hairs. Elytra at base slightly narrower than the pronotuni ; sides slightly convergent posteriorly, feebly arcuate near the humeri, nearly straight
148 NORTH AMERICAN toward the apical angles which are obtusely rounded ; together broadly triangularly and feebly eniarginate behind ; disk very convex, shining, distinctly wider than long and equal in length to the pronotum ; sculpture rather coarsely and very distinctly irabriuate, fnu'ly reticulate, very minutely and not distinctly punctato-asperate. Abdomen at base narrower than the elytra ; surface more finely and indistinctly sculptured ; apices not punctate, transversely and excessively finely strigose, having along each side a double line of erect very coarse long black bristles which are very prominent. Legs long and slender, dark rufo-testaceous, darker toward the coxae ; middle tibiae with one terminal spine, and also fimbriate at tip with unusually short and equal spinnles which are not as close as those of the preceding species, this tibia also has usually one outer and two inner spines along the sides ; under surface of the body nearly piceous-black. Length (contracted) 1.9-2.3 mm.
Jcnkintown, near Philadclpliia, 2.
Tlie (k'scription is drawn from the male ; the female lias on the discal surface of the second and tliird abdominal segments a third inner line of black bristles, one on each segment ; none of the bristles are apical, and they are all very large and conspicuous. The female is the smaller.
This species should probably be placed after basalis in Dr. Horn's table, and may be distinguished from that species by its very small size and the single terminal spine of the middle tibiae. In Conurus the anterior tarsi are dilated equally in both sexes, at least in all the species which 1 have examined ; and not as stated by Dr. Horn in the male only. It is probably a very extensive genus in the United States, judging by the above new forms found near Philadelphia, and the large number described from the tropical regions of our continents. They are exceedingly active and often difficult to capture, disappearing as soon as the bark, under which they usuallv live, is removed from the fallen log, and, unless a cloth is held in readiness below, they are generally lost.
BOLITOBIUS Steph.
It. facilis n. sp. — Form moderately robust, depressed. Head black; })n>ii(itum jiale flavo-testaceous, very translucent; elytra very translucent, tlavo- testaceous except a black spot near the apex of each indefinitely shaded, not attaining the apical edges, extending broadly to and along the epii)leurae, and becoming narrower toward the suture which is nearly attained,sutureverynarrowlydarkoastaneous;abdomenunicolorousabove and beneath, reddish-brown ; apices of the segments translucent and paler above, nearly black beneath. Head very slightly longer than wide, very liighly polished ; labrum, oral organs and first three joints of the antennae pale flavo-testaceous, remaining joints of the latter piceous-black ; maxillary