388 Coleopterological Notices, V. 



forms, and the indicated sexual characters of the male (1. c, p. 285) 

 must surely have been inadvertently taken from a specimen of 0. 



scidptus. 



O. iiilllius n. sp. — Stout, black, polished, the elytra dark rufous ; legs 

 and basal parts of the antennae pale ; integuments glabrous, with a few erect 

 stiff setae, the two occipital distinct. Head just visibly narrower than the 

 prothorax, nearly as long as wide, strongly but rather sparsely punctate, 

 broadly concave anteriorly, the frontal margin very broadly, feebly produced 

 and slightly sinuate, with the lateral angles obtuse; eyes convex; tempora 

 strongly arcuate from the eye to the neck, one-half longer than the former 

 and equally prominent ; neck two-thirds as wide as the head ; antennae one- 

 third longer than the head, the outer joints rapidly incrassate, basal joint 

 long, stout and cylindrical. Prothorax not quite twice as wide as long, widest 

 scarcely before the middle ; sides broadly rounded, convergent and sinuate 

 posteriorly, the basal angles prominent ; base arcuate ; apex truncate, feebly 

 sinuate laterally ; disk strongly trisulcate, strongly, longitudinally impressed 

 sublaterally ; strongly but sparsely punctate. Elytra a little wider and dis- 

 tinctly longer than the prothorax ; sides feebly divergent ; humeri exposed ; 

 base broadly emarginate in circular arc ; disk flat, "coarsely, closely punctate, 

 the punctures becoming slightly confluent along the middle of each. Abdomen 

 slightly narrower than the elytra, almost impunctate, minutely, sparsely 

 punctulate toward base. Length 5.0 mm. ; width 1.25 mm. 



Pennsylvania. 



The male from which the description is drawn, has two extremely 

 obsolete dentiform subapical elevations on the sixth ventral plate, 

 separated by one-fifth of the entire width, the seventh abruptly pro- 

 duced in the middle in a short gradually narrowed lig-ula, much 

 shorter than wide, with its apex slightly thickened, beveled and 

 transversely truncate, the surface of the segment and ligula per- 

 fectly even and flat throughout, the eighth narrowly, deeply im- 

 pressed throughout the length along the median line. 



This species is allied to fuscipennis, but differs in the male sexual 

 characters and antennal structure. 



O. montanus n. sp. — Stout, black, glabrous, highly polished through- 

 out, the elytra scarcely visibly rufo-piceous ; legs piceous-black, the tarsi 

 paler ; antennae scarcely paler at base. Head slightly narrower than the 

 prothorax, distinctly shorter than wide, strongly, not densely punctate, the 

 mandibles stout, arcuate, the apical concavity large, transverse ; frontal 

 margin very broadly, feebly produced, distinctly sinuate, with rather promi- 

 nent angles ; eyes moderate, prominent ; tempora strongly arcuate from the 

 eyes to the neck, not twice as long as the eye and rather more prominent ; 

 antennae one-half longer than the head, strongly incrassate, the eleventh 



