COLEOrXERA. 17,3 Retal lines coalescent laterally near the median line forming transverse ca^rinae which are abruptly bent posteriorly along the median line toward the base, so that from the former, in the basal half, tfie long retal lines extend outward, giving an arborescent appearance. Toward the sides of the disk the maculae are completely enclosed by the retal lines. The maculae have an interior elevated ring, and within this, a verrucate setigerous puncture, just behind the middle of the macula Strigafa. Maculae distinct toward the sides of the disk, becoming smaller and confusedlybroken up in the middle, without transverse lines ; the maculae even when distinct do not contain an elevated ring, but the surface is rugulose with partial indications of a ring at some points ; each contains an indistinct and very small verrucate setigerous puncture. aeneogaster.
Maculae usually distinctly enclosed by the retal lines at all points of the disk, but very slightly smaller in the middle ; each contains an interior and usually indistinct ring, and within the ring, the usual verrucate puncture. Prothorax widest before the middle 1... nan Ilia. Maculae nearly as in the preceding species except that the interior ring is smaller, stronger, and at a greater distance from the retal lines, and the maculae are more broken up near the middle. Prothorax widest behind the middle siniiola.
Maculae much larger than in any of the preceding species, very distinct throughout the disk ; retal lines very fine, within them scarcely any trace of an elevated ring, their surface being flat and very finely and strongly granulose. Near the middle of the disk there are two minute impressions, and toward the base, a narrow and distinct longitudinal canaliculation. aenescens.
A. Strigata Lee. — Tr. Am. Phil. Soc. 1859, p. 215. — Form broad; sides parallel. Color bronzed above, metallic greenish beneath ; elytra obscurely punctate and very strongly and roughly asperate, also irregularly undulated throughout ; pronotum distinctly more than twice as wide as long widest at or very slightly behind the middle ; sides broadly arduate, feebly sinuate just behind the middle. Antennae long and slender, first two joints very feebly reticulated, second very slightly elongate, oval, very much shorter than the third, third and fourth sub-equal in length, the latter about twice as long as wide. Prosternal intercoxal process very wide, lateral terminal teeth very broad and strong, apex slightly acute ; apical tooth long and slender, acuminateattip,sidesalmostparallel,■almostfillingthecavityofthemesosternum; sides of the latter not parallel, rounding behind ; maxillary palpi long and rather slender, second joint longer than the third, the latter much longer than wide, fourth much shorter than the second and third together. Length 5.5-7.0 mm. ; width 2.2-2.8 mm.
California, 7.
Besides the sexual character indicated above, another very remarkable one may be mentioned beautifully displayed in the present species, viz.: the inferior genital armor in tlie male is not punctate but finely Cont. Part II. 8 January, 1885.
174 NORTH AMERICAN reticulate, while in the female it is highly polished and strongly and sparsely punctate.
A. aeiieogaster L. et G. — Mon. Anth. p. 32. — Form rather narrow and elongate; sides parallel. Color very obscure and dull blackish-bronze above, aeneous beneath ; elytra much less strongly asperate and more feebly undulated ; pronotnm widest far behind the middle, more than twice as wide as long ; sides broadly arcuate, not at all sinuate behind the middle. lutercoxal process of the prosternum narrower, lateral terminal teeth broad and rather short, very acute at apex ; apical tooth very long and conspicuous, sides nearly parallel, leaving a large cavity in the mesosternum unfilled ; sides of the latter parallel. Antennae much shorter and more robust, first two joints very feebly reticulate, second nearly one-half longer than wide, much shorter than the third, the latter distinctly longer than the fourth, fourth but slightly more than on<'-half longer than wide ; maxillary palpi long, second joint but very slightly longer than the third, the latter distinctlylonger than wide, fourth joint very long and slender, nearly as long as the second and third together. Length 5.5-tj.O mm. ; width 2.1-2.2 mm. Arizona (Morrison), 4.
This species is very distinct, and, as the prothorax seems to resemble that figured for ceneogaster by Laporte and Gory, I have ciioseii this name for it. The expression employed in its descriijtion "d'un noir pourpre tres-fonce," seems to strengthen this conclusion. A. naniila n. sp. — Form rather narrow; sides parallel. Color above dull bronze, beneath metallic greenish ; elytra finely and very strongly asperate, rather feebly undulated ; prouotum very slightly more than twice as wide as long, sides rather strongly rounded, widest a little before the middle, sides thence nearly parallel for a short distance. Prosternal intercoxal process rather wide, more coarsely reticulate, more deeply emarginate at the sides, lateral terminal teeth narrower, longer and more pronounced, very acute at apex where there is, as usual, a distinct callosity, general form of the teeth that of an equilateral triangle ; apical tooth scarcely longer than the lateral, narrow, acuminate at tip, nearly filling the entire cavity of the mesosternum ; the latter rounded behind as in stritjata. Antennae long and slender, two basal joints rather strongly reticulate, second distinctly longer than wide, but slightly shorter than the third, the latter about as long as the fourth, fourth about one-third longer than wide, remaining joints more strongly serrate than in the preceding species ; maxillary palpi moderate, second joint much longer than the third, the latter scarcely longer than wide, fourth rather short and robust, much shorter than the two preceding together. Length 4.2-5.0 mm. ; width 1.6-1.9 mm.
California, G.
Easily distinguished by its small size, narrow form, and pronotum widest before the middle.
COLEOPTERA. 175 A. Sillliola n. sp. — Form broad and depressed; sides parallel. Color above dark and obscure brownish-bronze, beneath metallic greenish ; pronotum twice as wide. as long, widest behind the middle, much less strongly emarginate anteriorly, sides very broadly arcuate, irregularly and coarsely sub-serrate near the middle ; elytra feebly undulated, asperities much less prominent than in naimla. Prosternal interooxal jirocess very broad, feebly emarginate at the sides, lateral apical teeth very short and broad, rather obtuse at the apices which are very strongly callous ; apical tooth rather short, rapidly acuminate toward tip, filling nearly the entire cavity in the mesosternum ; the Side-pieces of the latter very arcuate, nearly closing the cavity behind. Antennae robust, first two joints rather strongly reticulate, second slightly longer than wide, very slightly shorter than the third, third and fourth equal in length, the latter as wide as long ; maxillary palpi short and robust, second joint longer than the third, the latter scarcely longer than wide, fourth scarcely perceptibly shorter than the second and third together. Length 4.8 mm. ; width 2.1 mm.
California, 1.
Distinguished from nanula by its much broader and more depressed form and by the shape of the pronotum.
A. aenescens n. sp. — Form moderately broad ; sides parallel. Color above bright bronze, beneath obscure aeneous ; jjronotum distinctly more than twice as wide as long, sides broadly arcuate, distinctly sinuate for a short distance immediately behind the middle ; elytra much smoother and less asperate or undulate than in the preceding species, the fine deep sparse punctures being very distinct and the interspaces moderately convex, finely and strongly granulate. Lateral terminal teeth of the prosternal process slightly wider than long, acute at tip ; terminal tooth small, narrow, nearly entirely filling the cavity of the mesosternum, the latter almost closed behind : maxillary palpi very short and robust, third joint scarcely as long as wide. Antennae having a cupreous lustre, first two joints strongly reticulate, second nearly globular, very slightly shorter than the third, third and fourth equal in length, the latter but very slightly longer than wide. Length 4.8 mm. ; width 2.0 mm.
California, 1.
This species is distinguishable at a glance by its smooth surface, brilliant^ bronzed color, and very large reticulations of the pronotum with comparatively feeble retal lines.
LYCTUS Fabr.
I.. parvullIS n. sp. — Form slender, convex ; sides parallel. Color throughout black, legs and abdomen dark piceo-fuscons, apical margins of the segments narrowly pale testaceous ; pubescence rather short, coarse and sparse, pale fulvous, arranged serially on the elytra ; sculi^ture of head and protliorax scabrous, cellular, the intervals being a fine network of narrow raised lines. Head small, much wider than long ; eyes large, very convex ;
170 NORTH a:merican interocular surface moderately convex, declivous toward tlie epistoraal sntnre which is transverse and very strongly marked, terminating laterally at the supra-antennal tiiberculations which are very strong ; epistoma short, four times as wide as long, strongly sinuate anteriorly ; labrum very short, strongly sinuate ; antennae much longer than the width of head, slender, two basal joints moderately robust, slightly elongate, equal in length, third much longer than the fourth, fourth and fifth siib-equal, seventh longer than the sixth or eighth, the former longer than the latter, ninth equal to the seventh, last two joints more robust, compressed, equal in length, the tenth triangular, the eleventh conoidal, both as wide as long ; last joint of the maxillary palpi twice as long as the third, moderately slender, acuminate. Prothorax widest at one-third the length from the apex where it is one-half wider than the head and about as wide as long ; sides strongly arcuate anteriorly, strongly convergent and straight posteriorly ; basal angles obtuse, not rounded, base one-third longer than the apex, arcuate except near the basal angles ; apex rery feebly arcuate ; apical angles obsolete from above ; disk moderately convex, scarcely impressed along the middle except near the base where there is a very narrow short canaliculation. Elytra at base about as wide as the pronotum ; sides parallel and straight for five-sixths the length from the base, then obtusely rounding behind ; humeral angles narrowl}' rounded ; disk sub-cylindrically convex, nearly twice as long as the head and prothorax together, two and one-third times as long as wide, shining, strongly and rather closely punctate ; punctures elongated longitudinallyandarrangedserially;nearthesuturetheyaresmallerandmore confused. Scutellum minute, wider than lojig, tuberculiform. Abdominal segments moderately convex, decreasing almost uniformly in length, finely and strongly granulo-rugulose, more coarsely so toward base, very sparsely pubescent. Legs sliort and slender ; first joint of tbe posterior tarsi very minute, last equal in length to the first four together ; anterior coxae mutually one-fourth as distant as either from the anterior margin of the prosternum. Length 2.8-3.2 mm.
Arizona (IMorrison), 2.
Differs very greatly from planicoUis Lee. in size, sliape of the pronotum and sculpture, especially tliat of tin; under surface of the abdomen, this being much coarser in parvulus. In both these species the outer apical angles of the anterior tibiae are sliglitly prolonged ; in Trogoxylon, however, tliey are iu>t prolonged, but merely very acute.
SEICICA MacLeay.
S. parallela n. sp. — Form sub-cylindrical; sides parallel ; color pale yellowisli-t>rruginons, legs and under surface slightly jialer, concoloroiis; integuments opaque throughout, not iridescent. Head one-half wider than long; occiput very finely sparsely and feebly punctate; clypeus strongly rather finely and not rugulosely punctate ; epistomal suture very fine, clearly defined, roundly angulate posteriorly, anterior margin sinuate in tlie middle and refit'xed ; eyes very large, convex ; last joint of the maxillary palpi three times as long as wide, slightly clavate, rather obtusely acuminate at
COLEOPTEKA. 177 tip; third joint of th(^ antennae very slightly longer than the fonrth, clnb sliglitly longer than the remainder ; there are near the eye on the upper surface several short setae which sometimes extend iu-a curved line across the head along the clypeal suture, and there are also a few scattered setae on the disk of the clypeus. Prothorax from above about twice as wide as long; sides very slightly convergent from base to apex, and rather evenly and distinctly arcuate ; apex about two-thirds as long as tlie base, transverselyandstronglyeraarginate,anglesacute;basebroadlyarcuate,feebly sinuate at each side of the middle, angles slightly obtuse and rather strongly rounded ; disk glabrous, moderately convex, finely and rather feebly punctate; punctures distant by from two to three times their own widths; lateral margins very narrowly reflexed and having a row of a few long erect setae. Scutellum very Hat, much longer than wide, sparsely punctate. Elytra across the humeri slightly wider than the pronotum ; sides parallel and nearly straight ; together very abruptly and obtusely rounded behind ; disk two-thirds longer than wide and three times as long as the pronotum, convex, glabl'ous ; longitudinal costae fine, not punctate, rather feeble, intervals narrower, feebly impressed, finely and irregularly punctate ; epipleurae having a row of rather closely placed erect setae. Under surface opaque, finely and feebly punctate, nearly glabrous except on the coxae and last ventral segment where there is a rather long fine and somewhat conspicuous pubescence. Legs slender, long slender posterior tibial spurs but sliglitly unequal in length ; posterior tarsi very long and slender, each joint having throughout its length beneath two. acute unequal carinae, the larger one being finely granulose ; first joint slightly longer than the second; claws rather long, deeply cleft at tip, terminal portion strongly bent, inner tooth robust, having the tip acute and very oblique. Length 8.0-9.0 mm. ; width 4.3-4.7 mm.
Atlantic City, New Jersey, 2.
This species eiin be distinguished from sericea by its smaller size, much paler color, and very large prominent eyes, and also by the shape of the posterior tarsal claw which is slightly shorter, more robust, and with the a[)ical portion finer and prolonged further beyond the inner in sericea. The surface when viewed perpendicuhiHy is not iridescent, but a slight amount may be observed when it is viewed very obliquely. The large eyes referred to above is apparently not a sexual character, as the sexes may be very readily separated by the longer or shorter antennal club, and there is then seen to be no very markeil difference in the size of the eye. It may prove a constant character for grouping aptirt some of the species in this difficult genus, as there is another species represented in my cabinet allied to tristis but having much larger eyes. S. porcilla n. sp. — About twice as long as wide, sub-<;ylindrical, dark reddish-brown, legs and under surface sliglitly paler ; shining throughout, not iridescent ; glabrous above. Head but slightly wider than long ; occiput rather sparsely finely and irregularly punctate ; clypeus very densely and
178 NORTH AMEniCAN conflupiitly so, the latter two-thirds wider tlian long, sides rather stronglyconvergent anteriorly and strongly arcuate, apical margin strongly sinuate, edges reHexed, scarcely more strongly so anteriorly than along the sides ; eyes small, not prominent ; last joint of the maxillary palpi equal in length to the first three together ; third joint of the antennae scarcely more than two-thirds as long as the fourth, fifth twice as long as the sixth, conical, irregularly hopper-shaped. Prothorax twice as wide as long ; sides slightly convergent from base to apex and moderately arcuate, straight toward the basal angles which are narrowly rounded ; apex slightly more than twothirds as long as the base, broadly and not strongly emargiuate, bottom of the emargination broadly arcuate ; base brO'idly arcuate, very feebly sinuate at each side of the middle ; disk moderately convex, polished, finely and somewhat irregularly punctate, narrowly impunctate along the middle toward the base, punctures smaller and more distant in the middle. Scutellum as wide as long, triangular, acutely rounded at tip, punctate except broadly along the middle. Elytra at base as wide as the pronotum, widest at twothirds the length from the base ; sides very feebly arcuate ; together abruptly and very obtusely rounded behind ; disk convex, very slightly more tlian one-half longer than wide, about three times as long as the pronotum ; longitudinal costae very feeble, broadly convex, impunctate, polished, intervals much narrower, finely and very irregularly punctate; punctures round, rather feebly impressed. Under surface somewhat finely, sparsely, and irregularly punctate throughout ; legs slender ; first joint of the posterior tarsi very slightly longer than the second ; claws long and slender, deeply and very narrowly cleft at tip, teeth of about equal length, the outer very fine and acute, straight near the tip, the inner robust, obliquely acuminate at tip. Length 7.0 mm.
Arizona (Morrison), 2.
The usual rows of setae along the latcM-al e<l2:es of the pronotum and elytra are present. The relative length of the third aiitennal joint may suffice to create a division in the genus.
I>IPLOTAXIS Kirby.
D, leTicllla n. sp. — F<irm moderately robust. Color throughout dark reddish-brown, tarsi very slightly paler ; dorsal surface glabrous, moderately shining, under surface having a few widely scattered erect robust setae which are very short. Head four-fifths wider than long; occiput broadly convex, coarsely and confusedly punctate, punctures somewhat transversely coal escent, scabrous and not very deep ; clypeal suture transverse in the middle, bent posteriorly at the sides to the eyes, rather well marked ; clypeus very densely and coarsely punctate throughout, transversely truncate and very feebly sinuous anteriorly, bent rather abruptly posteriorly at the sides to the eyes just before which the margin is slightly sinuous, margin somewhat strongly retloxed throughout from eye to eye ; labrum six times as wide as its median length, broadly and somewhat strongly sinuous anteriorly ; disk having a strongly elevated transverse ridge ; last joint of the maxillary palpi slender, fusiform, as long as the two preceding together ; antennae pale
C'OLEOPTKUA. 179 testaceous throughout, very short, not as long as the head, club scarcely as long as the first two joints together, second joint not one-half as long as the first. Prothorax widest at two-fifths the length from the base where it is distinctly more than twice as wide as long ; sides almost equally convergent anteriorly and posteriorly and very feebly arcuate ; apex distinctly shorter than the base, broadly emarginate ; base broadly arcuate, very feebly sinuate toward each basal angle, the latter very obtuse and very slightly rounded : disk rather convex, finely and closely punctate; punctures round, shallow and variolate, separated by two to three times their own widths. Scutelluni small, ogival, as long as wide. Elytra at base very slightly narrower than the pronotum, widest at two-thirds the length from the apex where they are but very slightly wider; sides very feebly arcuate ; disk abruptly and very broadly rounded behind, slightly less than one-half longer than wide and about three times as long as the pronotum, very minutely granuloso-reticulate, punctate ; punctures impressed, rather large, arranged in rows, the sutural row being composed of smaller punctures much more closely placed ; between this and the next regular row there is a wide area of larger punctures irregularly disposed ; along the middle of the epipleurae there is a row of stout erect setae. Legs rather long and slender ; tarsi very slender, first joint of the posterior equal in length to the second, more robust and strongly davate, third very slightly shorter, fifth about one-fourth longer than the first ; claws very strongly compressed, strongly toothed, tooth slightly shorter and more robust than the apical portion ; posterior tibial spurs equal in width, slender, very unequal in length. Abdominal segments imi)unctate except a close and somewhat irregular row of veiy large setigerous punctures arranged transversely along the middle of each, those of the last segment being scattered over nearly the entire disk ; pygidinni small, semicircularly rounded throughout beneath, disk very coarsely punctate, punctures very shallow and variolate, surface irregularly undulated, upper margin entirely exposed by the elytra. Length 7.5 mm. ; width 4.0 mm. Arizona (Morrison), 1.
D. popillO n. sp. — Form moderately slender. Color throughout rather dark brownish-red, head slightly darker, tarsi slightly paler than the tibiae ; dorsal surface moderately shining, rather sparsely but distinctly clothed with long erect rather coarse setae which are slightly longer, but scarcely more dense, beneath. Head about one-third wider than long, moderately convex,coarsely and very densely punctate ; punctures sofnewhat transversely coalescent on the front, rugulose or scabrous ; clypeal suture narrow and well-defined, transv^-se, bent slightly posteriorly near the eyes and feebly sinuate for a short distance in the middle; clypeus strongly transverse, apical margin broadly emarginate through three-fifths of its width, sides very widely divergent to the eyes, forming at the sides of the emargination two short rounded teeth, margin strongly reflexed throughout, most broadly so at the apical projections ; labrum bilobed, very transverse, having a transverse discal ridge, apical margin very deeply and narrowly sinuate; last joint of the maxillary palpi srimewhat lunate, elongate, nearly as long as the two preceding together, the latter equal in length ; antennae short, first joint
180 NORTH AMKRICAN much more than twice as long as the second, club fully as long as the first two joints togetiier. Prothorax widest at two-fifths its length from the base where it is slightly more than twice as wide as long ; sides almost equally convergent anteriorly and posteriorly, very feebly sinuate in the former, straight in the latter sense ; apex slightly shorter than the base, broadly and feebly emarginate ; base broadly arcuate ; apical angles acute and not at all rounded, posterior obtuse and very slightly rounded ; disk moderately convex, very coarsely aifd somewhat irregularly punctate, punctures deeply impressed and generally separated by two to three times their own widths. Scutellum small, scarcely longer than wide, narrowly rounded behind. Elytra at base as wide as the pronotura, widest at two-thirds the length from the base where they are nearly one-fourth wider; sides straight; disk abruptly and very broadly rounded behind, scarcely more than one-third longer than wide, convex, very coarsely and deeply punctate ; punctures round, deeply impressed, arranged in widely distant double or triple rows, the intervals being irregularly punctate; between the clearly defined sutural row and the suture there is a row of more widely distant punctures. Abdomen rather finely sparsely and evenly punctate throughout ; pygidium entirely exposed, slightly wider than long, parabolically rounded beneath, surface coarsely and rather closely punctate, fringed beneath with a dense line of short yellowish setae. Legs rather long and slender ; tibiae having a cluster of teeth just beyond the middle exteriorly ; first and second joints of the posterior tarsi equal in length, the former much more robust and clavate ; claws strongly compressed, wide, sides nearly parallel, cleft at tip, notch slightly more than one-fourth as long as the claw, inner tooth much more robust than the outer. In the male tlie outer tooth is longer and more slender. Length 8.5-9.5 mm. ; width 4.0-5.0 mm.
Arizona (Morrison), 2.
Tliis species should apparently be placed in a distinct subgenus together with LeConte's pithenihts from the same region, not only on account of the claws rather cleft at tip than properly toothed, and the hairy vestiture, but more especially because of the prominent anterior angles of the clypeus, and the deeply sinuate or bilohed labrum.
AXOillALA Sam.
• In looking over Dr. Horn's revision of the American species of this genus. I find that this author combines htteipennis Lee. and binofata Gyll. As I have very good sets of each of these foruis before me I feel prepared to maintain their specific distinctness. They differ in the following characters, which are independent of sex : — In iiiteipenuis the form of the body is more robust and the pronotum is proportionally much wider, the sculpture of the head and pronotum is coarser while that of the elytra is finer, the last joint of the maxillary palpi is very noticeably shorter and stouter, and the last joint of