COLEOPTERA. 133 minutely strigcato-reticulate, finoly evenly and rather closely punctate, more sjiarsely so toward tip. Legs long and slender; first joint of the posterior tarsi nearly one-half longer than the second, very much sliorter than the last. Prosternum very strongly and acutely carinate between the coxae. Female. — Second ventral segment with a tmnsverse feebly spongy fold just behind the middle, nearly straight and one-sixth as long as tlie segmental width, densely fimbriate with fine black setae ; third segment having just before the middle a similar fold, or more properly, narrow eroded and blackish-granulose area, which is slightly shorter than that of the second segment ; sixth segment truncate at tip, truncation extremely feebly sinuate in the middle, angles rounded.
Length 10.0 mm.
Willets Point, Long Island, 2.
Each dor.sal segment bears near the apex and just within the border a long stiff erect black seta. This species should probably follow the preceding in the catalogue ; it is distinguishable from it by its sexual characters, and the more slender form, paler color and more parallel and straight sides of the head in parallelum. Between the eyes there is a narrow transverse area which is almost free from punctures.
The species of Cryptobium must be extremely numerous in the New World ; as far as my own experience will allow me to judge they are never gregarious and always found singly, and are comparatively seldom taken. Of the five species in my own collection one has been described and four are now described for the first time, if the characters given by Dr. LeConte are constant and accurate. Another specimen from Willets Point, which has been unfortunately destroyed, evidently represented a species excessively closely allied \o proximum, in which the fold of the second segment was similar, but which was entirely devoid of any modification of the third segment. The specimen was so very similar to the type of proximum, only differing in the slightly greater convergence of the sides of the pronotum toward the base, that I am almost inclined to doubt the invariability of the sexual characters.
LATHROBIUM Grav.
L<. tricolor n. sp. — Form somewhat slender, rather strongly depressed. Pubescence of head prothorax and elytra in the form of very coarse erect sparse setae, of a very dark piceous color, that of abdomen very fine, long, recumbent, and extremely dense and even, very pale grayish-brown. Head small, from base of antennae about as long as wide ; eyes rather large, slightly oblique and slightly prominent, one-half their length from the bases of the antennae; sides behind them parallel and feebly arcuate ; posterior angles rather acutely rounded; base truncate, feebly sinuate in the middle ;
134 NORTH AMERICAN apex between the antennae straight, one-half as long as the width of head ; interocular surface broadly and evenly convex, polished, coarsely irregularly and somewhat sparsely punctate, punctures round, deeply impressed and varying greatly in size, very slightly less dense in the middle ; labrum more than twice as wide as long, very deeply and broadly bilobed ; third joint of the maxillary palpi but slightly longer than the second, very robust, conical, squarely truncate at tip which is circular in outline and very deeply excavated,thefourthjointverythinandacicular,oblique,andattachedatthe bottom of the deep concavity ; under surface of head, very minutely sparsely and feebly punctulate, surface minutely rngulose ; antennae as long as the head and prothorax together, not thickened toward tip, first joint scarcely as long as the next two together, second just visibly shorter than the third and equal in length to the fourth, the latter slightly thicker, joints four to ten decreasing very slightly in length, equal in thickness, the latter distinctlylonger than wide, last joint slightly elongate, constricted toward tip. Prothorax widest at the middle where it is very slightly wider than the head and nearly one-sixth narrower than long ; sides parallel throughout, feebly and evenly arcuate ; apex slightly longer than the base, tlie former broadly and feebly arcuate, the latter transverse ; apical angles rather acutely rounded, basal broadly rounded ; disk broadly and rather feebly convex, polished, having two medial rows of close rather coarse and irregularly disposedpunctures,intermediatespaceimpuiictate,betweenthemandthesides the punctures are rather fine, sparse, unevenly disposed and irregular in size. Elytra at base slightly wider than the pronotum ; sides very feebly divergent posteriorly and very feebly arcuate ; together very broadly feebly and triangularly emarginate behind ; disk broadly depressed, very feebly and evenly convex, about one-fourth longer than the pronotum, and about onefourth longer than wide, punctures rather coarse toward the suture where they are arranged in irregular rows, finer toward the sides where they are confused and more sparsely distributed, very feebly impressed throughout. Abdomen about as wide as tlie elytra; sides parallel and nearly straight; border strongly inclined. Legs moderate.
Mtde. — Sixth ventral segment sinuate at tip, sinus slightly wider than deep, evenly rounded at the bottom and scarcely more than one-half as wide as the apices ; the contiguous surface feebly and cylindrically impressed. First four joints of the anterior tarsus very broadly dilated, and extremely densely pubescent beneath ; fifth joint slender and nearly as long as the first fourtogether.
Fimalc. — Unknown.
Lengtli 4.5-0.0 mm.
Cape May, New Jersey, 2.
The coloi's in this fine species are as follows: — Head above anil neck (lee|) black, beneath piceous-black, paler towanl the median line ; labrum, oral orj^ans, antennae and legs tliroiigliout pale flavo-testaceous ; prothorax pale reddish-testaceous; elytra black, having a narrow suffused band at the base and a narrow edging along the suture reddish-testaceous ; abdomen pale yellowish-
COLEOPTERA. 135 brown from the pubescence, bases of the segments reddish from tlie transmitted light ; under surface of abdomen of tlie same color as the upper, bristling with long dense coarse erect setae toward tip. In the second specimen the elytral punctures are arranged in tolerablywell-defined rovvs nearly throughout the elytra.
Following the characters of Dr. LeConte's table of this genus as carefully as possible, it appears to come immediately after his ambiyiium.
L.. inops n. sp. — Form very slender, sub-depressed; color of body dark reddish-testaceous, abdomen slightly darker, legs slightly paler and more flavate, antennae slightly more flavate toward tip ; pubescence long, very sparse and fine, recumbent, not conspicuous, scarcely thicker on the abdomen. Head large, distinctly longer than wide, widest at one-fourth the length from the base ; eyes very small, not at all prominent, at more than their own length from the angles of the epistoma, and at three times their lengtli from the basal angles ; sides behind them just visibly divergent posteriorly and rather feebly arcuate ; basal angles broadly rounded ; base transversely truncate ; interocular surface broadly and evenly convex, shining,rather finely evenly and somewhat sparsely punctate, with a narrow line almost impunctate along the middle ; supra-antennal angulations rounded exteriorly, rather distinctly swollen, each with a small setigerous puncture ; anterior edge of the epistoma broadly truncate and distinctly sinuate in the middle, three-fifths as long as the greatest capital width ; antennae threefourths as long as the head and prothorax together, very robust throughout, not appreciably thickened toward tip, first joint nearly as long as the next two together, strongly narrowed toward base, scarcely twice as long as wide, second slightly narrower, slightly elongated, very little shorter than the third and longer than the fourth, joints four to ten about as long as wide, eleventh small, acutely conoidal ; second joint of maxillary palpi slightly bent ; neck short and broad. Prothorax slightly narrower than the head, slightly more than one-third longer than wide; sides nearly parallel and almost straight in the middle ; anterior and posterior angles broadly rounded toward the sides, more acutely rounded next the anterior and posterior margins, the former broadly arcuate, the latter very slightly shorter, transverse and feebly sinuate in the middle; disk rather depressed, polished, rather broadly impunctatealongthemiddle;puncturesrathersmall,aggregateddenselyin a broad irregular line at the borders of the impunctured area, then more sparse, and again more dense near the edges where they appear to tend to an irregular linear formation. Elytra at base scarcely as wide as the pronotum ; sides rather strongly divergent posteriorly and extremely feebly arcuate, nearly straight ; together broadly triangularly and rather strongly emarginate behind ; exterior apical angles broadly rounded behind ; disk very feebly convex, narrowly and rather strongly impressed along the suture, distinctly shorter than the pronotum, and slightly longer than the apical width, highly polished, and extremely feebly irregularly and somewhat sparsely punctate. Abdomen at base slightly narrower than the con-
13G NORTH AMEUICAX tigiious elytra ; sides straight and extremely feebly divergent posteriorly ; border nearly erect, thin ; surface rather feebly arcuate, shining, excessively finely and feebly punctulate. Anterior femora dilated, toothed beneath ; anterior tibiae dilated toward tip and channeled ; second joint of posterior tarsi distinctly longer than the first, equal in length to the third. Male. — Fifth ventral segment very feebly and evenly eniarginate in its middle third at apex, contiguous sui-face broadly and feebly impressed ; sixth segment eniarginate at tip, emargination two-thirds wider than deep, sides feebly convergent and straight near the angles, and broadly and arcuately rounded at bottom, contiguous surface feebly impressed anteriorly, sides in the form of low broadly rounded ridged which terminate at the angles of the emai-gination in rather well marked short slightly obtuse teeth ; seventh segment widely divided.
Female. — Sixth segment elongate, abruptly truncate at the immediate apex, truncation short and very feebly sinuate in the middle. Abdomen broader ; elytra shorter, sides much less divergent ; more closely punctate throughout ; smaller in size.
Length 5. 0-6.0 mm.
Lake SiiixM-ior, 2.
The above species appears to belonj; immediately after peddle in Dr. LeConte's table, and is described from two specimens which I received from Dr. LeConte in a heterogeneous mixture of refuse material in great part unlabeled, and which Dr. LeConte thouglit came from the Lake Superior region. As some of the specimens liad Panama, S. Amer. labels, and others unlabeled I have since found also came from that region, it may be possible tliat the species is in reality a native of Panama.
It is evidently undescribed from Xortli America, and is of such an interesting type that I have taken pains to describe it at length. ORIJS n. gen.
Attention is called at this opportunity to a very serious error which has entered our tables of genera, by whicli the antennae in all tiie species occurring in North America and hitherto associated with Scopanis, are termed straight. In our minute very slender species the antennae are very strongly geniculate, but in opacns (Lee.) they are straiglit. Then^ are many reasons, however, for believing that oparns does not belong to the same genus as our small species of ScojiaHis, and a'* it satisfies Lacordaire's description of Sco|)a'us, it is undoubtedly correctly placed; for the minute forms exigmis, picipes and pmicfnfiis, I have created a new genus on account of the very different structure of the maxillary palpi and form of the pronotum, in addition to the geniculate antennae. In the species of Stilicus also which I have
COLEOPTERA. 137 examined from tlie United States, the antennae are rather strongly geniculate and not straight as stated in the " Classification of the Coleoptera of North America."
O. picipes n. sp. — Slender, depressed. Color throughout piceousblack ; tarsi paler, testaceous ; antennae dark blackish-fuscous toward base, palpi same; integuments iinpunctate, finely evenly and strongly' alutaceous throughout every portion of the body, granulation coarser on the elytra and abdomen ; pubescence of head and ijronotum very tine, sparse and inconspicuous,thatoftheelytramuchmoredense,tliatoftheabdomenverydense, short, fine, recumbent, cinereous, conspicuous. Head rather large ; sides behind the eyes parallel and nearly straight ; base transversely truncate ; posterior angles rather narrowly rounded ; eyes rather large, very coarsely granulated, at more than their own length from the base, somewhat prominent ; interocular surface rather strongly convex, narrowly rounded anteriorly ; antennal tuberculations small and prominent, intermediate surface flat ; labrum transverse, very strongly ridged longitudinally, middle teeth rather long and prominent ; antennae slightly shorter than the head and prothorax together, strongly geniculate, slender, tip of apical joint paler, basal joint robust, snb-cylindrical, two and one-half times as long as wide, very slightly longer than the next two together, second slender, very slightly longer than the third, joints four to ten sub-moniliform, nearly equal in length, increasing very slightly in width ; third joint of maxillary palpi longer than the second, more than twice as thick, very robust, obtusely rounded at tip, fourth not visible. Prothorax slightly longer and very slightly narrower than the head ; sides parallel and very feebly arcuate, strongly convergent in the anterior fifth and nearly straight to the neck which is very slender and scarcely one-fifth as wide as the head ; base broadly and very feebly arcuate ; basal angles rather broadly rounded ; disk rather strongly convex, much less so than the head, nearly one-third longer than wide. Elytra very slightly wider than the head ; sides parallel, slightly arcuate, more strongly so near the apical angles ; together broadly roundly and rather feebly emarginate behind ; disk much longer than the ijronotum, one-third longer than wide. Scutellum very small, semi-circular in outline. Abdomen at base very slightly narrower than the elytra ; sides of the first four segments gradually divergent and straight ; border strong, inclined, equal ; fifth segment nearly as long as the two preceding together, sixth short. Legs rather short ; femora swollen, upper edges rounded, strongly arcuate, slightly paler toward tip ; tibiae slightly swollen toward tip ; tarsi rather robust, first four joints of the anterior slightly dilated and spongypubescentbeneath.
Male. — Fifth ventral segment very broadly and feebly sinuate througliout its width at apex ; sixth emarginate at tip, notch more than twice as wide as deep, narrowly rounded at the bottom, sides feebly arcuate, apices angulate ; seventh narrow, minutely emarginate at tip.
Female. — Body slightly wider ; anterior and middle legs paler ; sixth ventralsegmentangularlyroundedbehind.
Length 2.3-2.5 mm.
138 NORTH AMERICAN Cape May, New Jersey, 5.
Tliis species is somewhat abundant under debris on tlie sea-beach at Cape May, and can easily be distinguished from exigiius by its dark legs, sexual character and structure of the head. The anterior tarsi in the female are spongy beneath, but slightly less dilated than in the male.
O. piinctatllS n. sp. — Very slender, filiform, rather convex, intense black tlirougliout, polished, punctate; abdomen alutaceous, coarsely granulose ; antennae, tibiae, tarsi and second joint of the maxillary palpi dark fuscous ; femora and third joint of the maxillary palpi very dark piceousblack ; labial palpi very pale rtavo-testaceous, rather opaque ; pubescence fine and very sparse except on the abdomen where it is slightly dense, pale fulvous. Head longer than wide ; sides behind the eyes parallel, distinctly but feebly arcuate, truncate at base ; posterior angles rather broadly rounded ; eyes small, feebly convex, at nearly twice their length from the base ; interocular surface and occiput strongly convex, declivous at the base and sides behind the eyes, scarcely punctate anteriorly, finely evenly and rather densely so posteriorly and laterally; punctures round, very small, rather deep, seijarated by scarcely twice their own widths ; not punctate but very minutely ruguloso-strigate beneath, broadly and rather feebly arcuate anteriorly between the antennal tuberculations which are small and not very prominent ; labrum strongly rugose anteriorly, middle teeth stout, acute at tip and well marked ; antennae about one-half longer than the head, rather slender, very feebly incrassate toward tip, basal joint moderately thick, as long as the next two together, second much longer than the third ; basal supports of the labial palpi very prominent, appeaj-ing like a basal joint, first joint small cylindrical, as long as wide, second twice as long, oval, scarcely thicker, third very thin acicular throughout, shorter than the second ; second joint of the maxillary palpi thin, slightly bent and very feebly thicker toward tip, third much longer than the second, more than twice as thick, twice as long as wide, very thin at base, strongly and evenly clavate, narrowly truncate at tip, fourth scarcely visible, extreruely minute, oblique, subulate. Prothorax slightly shorter than the head and distinctly narrower ; sides from the apex very strongly divergent and feebly arcuate for one-fourth the length, thence just visibly convergent to the basal angles and nearly straight ; basal angles rounded ; apex equal in width to the neck, transverse, two-fifths as wide as<the pronotum ; base transverse; disk rather convex, about one-fourth longer than wide, rather sparsely coarsely irregularly and very feebly punctate ; medial longitudinal area impunctate. Scutellum small, very transverse. Elytra at base much wider than the head ; sides parallel, feebly arcuate ; together broadly roundly and very feebly sinuate behin<l ; apical angles rounded ; disk rather convex, rather coarsely evenly and extremely feebly punctate ; punctures round, distant by one-half more than their own widths ; somewhat more than one-third longer than the j)ronotum, and more than one-third longer than wide. Abdomen at base distinctly narrower than the elytra; sides divergent and straight, and the
COLEOPTEKA. 139 border strong and nearly equal throughout the first four segments, fifth as long as the two preceding together, sixth mucli shorter ; under surface much paler toward tip. Legs slender ; femora slender, very feebly swollen ; first four joints of the posterior tarsi very short, cylindrical, decreasing very gradually but distinctly in length. Abdomen beneath very slightly paler towardtip.
Male. — Fifth ventral segment abruptly produced in the middle fourth at apex into a very short wide process which is broadly arcuate behind, with its surface slightly reflexed and impressed in the middle, the impression extending anteriorly for a short distance along tlie segment ; sixth segment deeply emarginate at apex, notch slightly deeper than wide, taking the entire apex, bottom acutely rounded, sides sinuate, apical angles slightly produced inwardly,more broadly rounding externally and thence anteriorly along the sides of the segment, apices very narrow ; middle process of seventh segment very narrow, flat, sides parallel and straight, truncate at tip. Female.—Unknown.
Length 3.0 mm.
California, 1.
A very singular species, not only from its resemblance in sculpture to Latlirobium, but because of its sexual characters.
STILICUS Latr.
S. latillSCIllllS n. sp. — Form rather robust, depressed ; sides parallel. Pubescence of head and pronotum excessively fine and sparse, scarcely visible ; that of the elytra much coarser, rather sparse, pale, not conspicuous ; that of abdomen much finer, more dense and recumbent toward tip. Color throughout deep black ; elytra slightly aeneous, pale testaceous along the apical edge, more widely so toward the apical angles ; legs pale brownishrufous ; anterior coxae much darker, castaneous ; antennae dark reddishfuscous. Head large, very slightly longer than wide ; sides behind the eyes strongly convergent, moderately arcuate ; posterior angles broadly rounded ; base above truncate at the neck, beneath strongly emarginate in the middle, emargination in the form of an acute cusp ; eyes large, rather prominent ; genae from the eye to the neck equal in length to the former ; interocular surface very moderately convex, coarsely variolately and extremely densely punctate, punctures elongated, and, toward the sides, semi-coalescent ; in the middle in a very small elongated area they are isolated and comparatively sparse ; supra-antennal tuberculations small and prominent ; epistoma transverselytruncate anteriorly; labrum broadly arcuate, rounded at the sides, teeth very small, short and robust ; antennae but slightly longer than the head, very slender, very feebly incrassate toward tip, basal joint slender, slightly longer than the next two together, second much shorter and slightly more robust than the third, fourth as long as the second, more slender than the third, two-thirds longer than wide, tenth slightly wider than long, eleventh conoidal, finely acuminate ; under surface strongly and roundly declivous behind and toward the emargination, nearly fiat between the eyes, coarsely and very densely punctate, punctures generally not coales-
140 NORTH AMEUICAN cent, interspaces one-third as wide, polished. Neck very narrow. Prothorax widest at one-tliird the length from the apex where it is distinctly narrower than long ; sides thence very strongly convergent and feebly sinuate to the anterior angles, and very feebly convergent and nearly straight to a point one-fourth the length from the base where they become much more strongly convergent and straight to the basal angles ; apex scarcely more than onehalf as long as the base, broadly sinuate ; apical angles acute ; base broadly arcuate ; disk very strongly convex, coarsely variolately and densely piinctate, punctures nearly round and not coalescent ; along the middle there is a bioad highly polished impunctate area, equally wide throughout, and having along its crest a very feeble stria. Elytra at base slightly narrower than the head ; sides parallel, feebly arcuate toward the apices ; together broadly roundly and very feebly eniargiuate behind ; disk slightly longer than wide, depressed, highly polished, impressed rather strongly along the suture toward the base, very minutely evenly and sparsely punctate, punctures round and very distinct. Abdomen at base slightly narrower than the elytra; sides divergent to the third segment which is equal in width to the fourth ; border strong ; surface broadly convex, finely closely and asperately punctate ; punctures arranged transversely and sub-serially ; each dorsal segment bearing near the apex on each side and within the border a long erect black seta, and a short discal one near the middle. Legs slender : first joint of the posterior tarsi as long as the next two together. Prosternum narrowly and somewhat feebly carinate.
Male. — Fifth ventral segment broadly roundly and very feebly eniargiuate in the middle tliird at apex, not toothed ; sixth segment abrui)tly emarginate in its middle tliird at apex, emargination evenly and almost semicircularly rounded, slightly more than twice as wide as deep.
Female. — Second joint of antennae distinctly longer than the fourth, very slightly shorter than the third. Sixth ventral segment evenly rounded behind.
Length 3.7-4.6 mm.
Willets Point, Long Island, 3; Atlantic City, New Jersey, 1. It is very singular that such a distinct and well-marked species aa the present should have so long escaped detection. It probably should be placed immediately after opacidus in Dr. LeConte's table of the genus, and may be distinguished from qi(adriceps by the head not being (juadrate beiiind the eyes and not emarginate at base above; from opaculiis it is at once distinguishable by the sexual characters. The above description is taken from the male. The pronotum has on each side two long erect black setae.
While writing of this genus it is proper to remark that the portion of the head behind the eyes in my representative of S. rudis Lee, altlioiigh very nnich longer than usual in this genus, is still one-third wider than long, and not as Dr. LeConte states longer than wide.