196 BULLETIN 63, UNITED STATES NATIONAL MUSEUM. 



Propleune opaque, smooth, very sparsely and finely punctate; 

 usually more or less rugulose. 



Elytra oblong to elongate oval, nearly twice as long as wide, feebly 

 shining, at times more or less opaque; hose feebly emarginate or 

 sinuate laterally within the humeri beneath basal angles of the 

 pronotum, scarcely to slightly wider than the contiguous protho- 

 racic base; humeri scarcely prominent, obtuse; sides evenly and not 

 strongly arcuate, frequently subparallel at middle, apex not pro- 

 duced and rather broadly rounded; disc quite strongly depressed, 

 slightly convex, suddenly defiexed laterally with margin narrowly 

 rounded but acute at humeri, posteriorly more or less suddenly 

 obliquely declivous; surface sulcate, intervals slightly convex with a 

 single series of irregularly placed punctures, first four sulci with a 

 single series of fine muricate punctures, the remaining outer sulci 

 more densely muricately punctured ; apical declivity more strongly 

 sulcate and muricate; infiexed sides obsoletely sulcate and irregu- 

 larly muricately punctate. Scutellum broad and impunctate. 



Einpleurw moderate in width, somewhat rapidly but gradually 

 and slightly dilated immediately beneath the humeri ; surface gla- 

 brous and shining, more or less obsoletely or finely and very sparsely 

 punctate. 



Sterna and parapleurai more or less obsoletely or strongl}' punc- 

 tate and rugose. 



Abdomen finely and more or less obsoletely punctate and rugulose; 

 fifth segment more strongly punctate. 



Legs moderately long and stout, and the anterior femora are armed ; 

 anterior tibial spurs dissimilar in the sexes; first joint of the protarsi 

 thickened and feebly produced in apical half beneath, and bearing a 

 tuft of golden pubescence, nearly similar in the sexes. 



J/<//c'.— Elongate. Antenna? reaching to the basal fifth of the 

 prothorax. Elytra nearly twice as long as wide, with the sides 

 slightly arcuate or siil)parallel, dorsum strongly depressed, quite rap- 

 idly arcuate and obliquely declivous posteriorly. Abdomen obli(|ue, 

 moderately convex, broadly impressed on first two segments. Femora 

 iiiuch thickened and armed with a strong, oblique, slightly })rodiice(l 

 subacute tooth; protibial spurs similar and about equal; first joint of 

 the protarsi with a small, dense, obtusely rounded tuft of yellowish 

 pubescence on the produced tip beneath, groove obliterated. 



Female. — Robust. Antenna? reaching to about the posterior third 

 of the prothorax. Elytra broadly oval, with dorsum moderately de- 

 pressed and (H)nvex, about one-half longer than wide, and nearly 

 vertically declivous posteriorly. Abdomen horizontal, evenly and 

 strongly convex. Profemora with a small obtuse tooth; tibial spurs 

 long, the posterior spur of the ])rotil)ia> more robust, slightly longer 

 and more obtuse, more strongly divergent than the anterior; first 



