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BY MARTIN L. LINELL, Aid, Department of I fleets. :'•:?-■ From the Proceedinga of the United States National Museum, Vol, XIX, pageu 393-401. [No. 1 1 13,] ,M WASHINGTON: GOVERNMENT PRINTING OFFICE. 1896. DESCRIPTIONS OF NKW SPECIES OF NORTH AMERICAN COLEOPTERA IN THE FAMILIES CERAMRYOIDJ*: AND SCAEAB.EID.E. By Martin L. Linell, Aid, Ih'parlmenI of Innects. While incorporating recent .accessions in the collection of North American Ceranibycida^ in the United States National Museum, sev- eral undescribed species were met with. For one of these, a snnill species from southern Texas with remarkable antennal stru<;tnre, it was found necessary to ert^ct a new genus. Two new species of Scar- abffiida^ are also described. ELAPHIDION ALBOFASCIATUM, new species. Cylindrical, robust, uniformly black, shining, sparsely clothed with rather long, mostly appressed, grayish white hairs, ccmdensed on the middle of elytra to a straight transverse fascia. Antenna' without sinnes, piceous brown, very stout, shorter than the body in both sexes; first joint thick, clavate, a little longer than third; ftmrth shorter than third; fifth to eleventh subequal in length; third and fourth strongly, fifth slightly campanulate at apex; fifth to eleventh flattened, suban- gulate internally at apex. Palpi subequal; last joint triangular, obliquely truncate. Thorax slightly longer th.an broad, cylindrical, broadly but not strongly constricted at base, hardly constric-ted at apex; disk coarsely, moderately densely punctate with a shining cal- losity, more or less diamond-shaped, at middle and an obsolete tuber- cle at the sides behind the middle. Scutellum transverse, rounded, densely hairy. Elytra parallel, truncate at base, conjointly rounded at apex without spines, coarsely but not very densely punctate at base, abruptly more finely punctate behind the anterior margin of the wliite band and gradually smoother toward apex. The longer white hairs forming the band sometimes continue to a])ex, but generally the band is very distinct. Ventral surface more shining, moderately punctate; abdomen finely punctulate. Sixth ventral segment exposed, in the male corneus, deeply concave with margin rounded, in the female membranous, truncate. Legs short, moderately stout, coarsely and densely punctate. Proceedings U. S. National Museum. Vol. XIX-No. 1113. 394 XORTH A2IEIIICAN COLEOPTERA—LIXELL. VOL. XIX. Tarsi broad, parallel; first joint of the posterior pair slightly longer than second and third togetlier. Length, 14 niin. Typc.—^o. 202, U.S.N.M. Of this liandsonie, strikingly distinrjt species twenty examples were collected l)y Mr. D. \V. Co(iuillett in the month of July in the foothills bonlering Mohave Desert on the south, Los Angeles County, California. It resembles E. mafttum, Le Conte, but may bo at once distinguished by the unarmed antennte, the coarser white vestiture, and the elytral fascia. Genus PIEZOCERA, Serville. Lacordaire's group Piezocerides is closely allied to Ibiouides, dittering only by tlie serrate antenna'. The principal generic characters of Piezo- vera are the strongly compressed tibia', and the flattened antennal tuber- cles, separated on the front only by a flue, impressed line. Four or flve tropical Amerii-an si)ecies are described, and one, P. monochroa, Bates, from Almalonga, Mexico. This latter is closely allied to the following Texan species, but jiidging from Bates' description has a different thorax. PIEZOCERA SERRATICOLLIS, new species. Linear, uniformly dark castaneous, shining, sparsely cov ^red with long erect hairs. Antenna? three-fourths the length of the body, from the third joint strongly flattened, serrate, bicarinate on both sides and with an additional short median carina at apex of each joint; third to tenth joints subequal in length, triangular, longer than broad ; eleventh joint longer, obtuse at apex. Thorax twice longer than broad, broadly and strongly constricted at base, slightly concave and smooth before the constriction at middle, with an obtuse smooth tubercle each side of the concavity; disk with sparse setiferous punctures; sides broad- est before the basal constriction and slightly narrowed to apex, with numerous setiferous tubercles, making the margin appear crenulate if seen from above. Elytra broader than thorax, subparallel, longi- tudinally impressed on the disk alongside the suture, with sparse setiferous jiunctures arranged subseriately j intervals nearly smooth ; apices strongly obliquely truncate inward, the angles rounded. Legs sparsely hairy; femora moderately clavate, nearly smooth; tioiat strongly compressed and carinate, with a series of coarse punctures along the exterior side; tarsi broad, short; first joint of the posterior pair one-half longer than the second. Length, C ram. One example, collected by Prof. C. H. T. Townseud at Brownsville, Texas. Type.—Hio. 203, U.S.N.M. IBIDION EXCLAMATIONIS, Thomso .. Two examples of this species, previously recorded from Almalonga, Mexico, are in the National Museum, collected by Prof. C. H. T. Townseud, VOL, XIX. f longer lea were foothills iliforiiia. islied by bl fascia. iittering of Piezo- ill tiiber- ir or five f, Bates, ollowing differeut ^eil with dy, from ides and third to eleventh , broadly h before ach side J8 broad- »ex, with Tenulate }1, longi- I sparse smooth ; d. Legs tibiae unctures posterior wnsville, HO. 1113. PlWCEEDiyOS OF THE NATIOSAL MUSEUM. 395 malonga, ownsend, at Brownsville, Texas. The genus Ibidion^ that now enters the list of our Texan fauna, differs, according to Lacordaire, from Compm, Perty, only by the cariuato tibia*. Tlie generic character is not very distinct in this species. IBT.DION TOWNSENDI, new species. Male. — Linear, shining, piceous brown, covered with a flue golden pubescence, dense on the protliorax and at the sides of the ventral surface, spar.se on the elytra and legs and absent from the antenna'. In addition to this it has sparse long erect hairs, longest and most numerous on the six basal joints of (lie antenuie and on the femora. Head broader than thorax, coarsely punctate. Antennal tubercles prominent, acute. Antenna; one-half longer than the body, first joint stout, coarsely punctate, as long as the fourth ; third to sixth thickened, somewhat flattened, sparsely but roughly punctate, linear, finely cari- nate above; third joint nearly twice longer than fourth; fifth and sixth equal, one-half longer than fourth; the five apical joints equal, filiform, l)ale in color. Thorax cylindrical, a little more than twice as long as broad, very finely and densely punctulate, with a smooth, raised median line, abbreviated at each end. Scutellum semicircular, densely golden pubescent. Elytra parallel, one half broader than thorax ; the inflexed sides subopaque, light brown, minutely punctate; disic piceous, sparsely coarsely punctate, flattened and longitudinally impressed at basal third ; equidistant from suture and margin are two elongate ivory spots, the anterior one just outside the impression at basal third, the posterior one twice shorter at apical third. Thighs strongly clavate, sparsely and minutely punctulate. Tibije dilated toward apex, especially the anterior ones, distinctly carinate. Length, 6.5 to 7.5 mm. Two examples; collected June 7 and 23 at Brownsville, Texas, by Prof. C. H. T. Townsend. Type.— No. 204, IT.S.N.M. PCECILOBRIUM RUGOSIPENNE, new species. Linear, cyaneous, shining, anterior femora reddish yellow. It differs from P. chalybceum, Le Conte, as follows : Thorax less rounded on the sides, subcylindrical, sparsely but strongly punctate. Elytra coarsely and densely rugosopunctate. Length, 4 J mm. One example from Cali- fornia. Type.— No. 205, U.S.N.M. OBRIUM MOZINNiS, new species. Elongate, parallel, very shining; sparsely hairy, reddish yellow, elytra, autenme, tlbiie, and tarsi black. Head as broad as elytra, sparsely coarsely punctate each side of a smooth median space; clypeal suture deeply impressed. Antennnj a little longer than the body; first joint sparsely punctate, shining, clavate, as long as the third; third { 866 NOllTU AMKIilCAN COLKOI'TKKA—LINELL. VOL. XIX. and fourth equal, slightly incrassate toward apex, sparsely hairy; fifth to eleventh a little lonjjer, e(]ual, filiform, subopaque, finely pu- bescent. Thorax slij^litly longer than broiu), narrower than the head, strongly constricted at base, much less constricted at apex; sides obtusely angulate between tlio constrii'tions; a deep fovea above tlio angle; disk with very sparse setigerous punctures. Elytra witli (toarse, spar.se setigerous punctures, subseriately arranged; apices separately rounded. Ventral surface and femora with sparse, minute, setigerous punctures; tibiu; and tarsi with denser hairs. Length, 4 mm. Male. — Thorax immaculati^; abdomen bla(^kish at base; fifth ventral segment witli a siunicircular emargination. Female. — Thorax with a transverse black spot on disk; abdomen immaculate; second segment very broadly emargimite, semieircularly excavate, excavation filled up with a dense brush of yellow, coarse hairs; third segment broadly concave, smooth ; fourth flat, semicircular, notched at ai)ex; fifth very narrow, triangular, obtu.se at apex. Two examples, male and female, collected by ]\Ir. E. A. Schwarz, June 5, at Brownsville, Texas, on Mozinna spatulata. Mr. Schwarz recognized this as an undescribed species and labeled it with the MS. name used above. Tj/pe.—'So. 200, IJ.S.N.M. TETRANODUS, new genus. Ant !..ia^ with joints tliird to sixth strongly incrassate and clavate; eyes coarsely granulate. In other generic characters it agrees with Emlcrces of Le(!ont( . Type. — TetranodtLs nitjeicotlis, new species. TETRANODUS N I VEICOLLIS, new species. llufous, apical half of elytra, a spot behind the humeri, abdomen and tibiio black, 8i)arsely covered with whitish, flying hairs. Head very coarsely and densely punctate, geuje rugose. Eyes small, coarsely granulate, deeply emarginate, rounded in front, gradually attenuated behind the base of the antenna'. These latter somewhat longer than the body, finely pubescent, 11-jointed; first joint moderately stout, slightly arcuate, as long as tlie fifth; second joint small, a little longer than wide; third nearly twice longer than fourth, strongly clavate, rounded at apex; fourth, pyriform; fifth and sixth, subecpial, each longer than fourth, oval, pedunculate; last five joints vSleiider, seventh to tenth gradually decreasing in length, eleventh equal to tenth. Thorax more than twice longer than broad, strongly arcuate upward from the base, densely longitudinally strigose ; base strongly constricted, with a trans- verse band of dense silvery white hairs. Elytra, cylindrical in outline, hardly broader than thorax, convex and conjointly rounded at apex; subbasal ridge slight, obtuse; a deep transverse depression at basal third, behind which there is a strictly transverse, strongly elevated \ VOL. XIX. ily liairy; finely pu- the bend, ex; sides iibove tlie til (toarse, leparately *etigerous • th ventral abdomen circularly i\v, coarse iiicircular, iX. Schwarz, '. Schwarz 1 the MS. lI clavate; jrees with , abdomen rs. Head 11, coarsely itteniiated 3r than the it, slightly mger than e, rounded )nger than I to tenth lorax more 1 the base, th a trans- in outline, i at apex; n at basal Y elevated NO. Ilia. rnarEEDiNdS of the xatioxal mvsevm. 397 ivory vitti), not quite rea. puhcrvlns and jjojotwo the thorax is broadest behind the middle), slightly narrowed to base, arcuately nar- rowed to ai)ex; all the angles rectangular; apex somewhat narrower than the base, truncate, with a membranous margin; base arcuate at middle ; disk moderately densely and deeply punctate. Scutellum semi- oval, with a few punctures at base, smooth at apex. Elytra at base hardly broader than thorax, slightly wider posteriorly ; costaj not very distinct, each with a series of punctures; intervals with slightly larger punctures of the same size as on thorax, subseriately arranged at the sides. Pygidium deeidy punctate. Thorax beneath densely and coarsely punctate. Abdomen nearly smooth at middle, coarsely punc- tate at the sides. I- gs sparsely punctate and hairy. Anterior tibire tridentate, the two apical teeth strong, the upper one small. Claws cleft at apex; the inferior part nearly as long as the superior, oblique at apex. Length, 6.5 to 7.5 mm. Six examples from Brighton, Nueces County, Texas. Type.— No. 212, U.S.N.M. Of the hairy species of Diplotaxis, the sordida of Say, is large (11 mm.) and has the anterior thoracic angles acuminate; J), puberulue, LeCoute, is elongate and has the anterior thoracic angles obtuse, and J), popino, Casey, has truncate and angulate clypeus. All of these species have longer hairs. J), cribnlosa, LeConte, io described as having short hairs, but the head is densely punctate and the clypeal suture impressed. COPRIS MCECHUS, LeConte. A specimen of this species, previously recorded only from Texas, was collected at Los Angeles, California, by Dr. W. J. Karlsioe (November, 1891). LACHNOSTERNA KARLSIOEI, new species. (Group /H«crt of Horu.) liobust, oblong, parallel, rufopiceous, very shining. Clypeus very wide, distinctly emarginate, sparsely punctate; margin moderately reflexed; front more densely punctate. Thorax broadest at base, arcu ately narrowed to apex; margin very indistinctly crenulate; surface moderately cofirsely, not very densely, punctate; punctures umbilicate; VOL. XIX. t in tbi »parsely sely but , a short slightly jointed, er than lorax is ely nar- lar rower cuate at im semi- at base not very ly larger mged at sely and sly punc- ior tibia». . Claws , oblique is large uberuliie, ;use, and of these is having il suture jxas, was [)veuiber, NO. 1U3. PROCEEDINGS OF THE NATIONAL MUSEUM. 401 »eu8 very oderately ise, arcu surface obilicate; median line indistinct. Elytra rather coarsely and rngosely punctate, the costiB evident. Pygidiuni as long as broad, oval at ai>ex, coarsely and s|)arsely punctate. Metasternum with dense long hairs. Abdo- men finely punctulate, sparsely along the middle. Claws strongly cnrvate, with a strong median tooth. Last joint of maxillary palpi ovate, not impressed. Length, 25 mm. M(dc. — Antenna' wanting in the type. Abdomen flattened along the middle; penultimate segment near the margin with a strong, nearly straight ridge, widely overhanging the whole length; last seg- ment sparsely granulate, with a rounded, shallow fovea. Posterior tibia? with the inner spur slightly curvate, two-thirds the length of the outer one. ('laspers intermediate in shape between those of L.