188 BULLETIN 63, UNITED STATES NATIONAL MUSEUM. 



Black or brownish, oblong, elongate. 



Head slightly more than one-half as Avide as the pronotmn at 

 middle, and slightly less than twice as wide as long; usually more or 

 less convex; rather opaque, and coarsely, irregularly punctured, fre- 

 quently with impunctate areas at middle; laterally densely punctate. 

 A7itennm moderate, reaching nearly to the prothoracic base; outer 

 four joints just noticeably compressed, gradually and very slightly 

 dilated, third joint scarcely as long as the next two taken together; 

 fourth slightly longer than the fifth, the latter to the seventh, 

 inclusive, subequal and longer than wide; eighth subtriangular and 

 about as wide as long; ninth and tenth suborbicular ; eleventh ovate. 



Pronotmii shining or somewhat opaque, about one-fifth wider than 

 long; disc evenly and more or less convex, generally declivous at the 

 apical angles, glabrous, finely, sparsely, and irregularly punctate, 

 punctures becoming denser and coarse along the sides ; apex truncate 

 or feebly emarginate, rather coarsely or more or less obsoletely mar- 

 gined; aides evenly and rather broadly arcuate to the posterior fourth, 

 thence feebly sinuate or oblique to the basal angles, marginal bead 

 moderately coarse and narrowly reflexed; hase feebly arcuate, fre- 

 quently slightly sinuate at middle, rather coarsely beaded and about 

 one-sixth wider than the apex ; apical angles obtuse ; basal angles dis- 

 tinct, more or less rectangular, sometimes very narrowly rounded. 



Propleurcv impunctate and rugulose; frequently sparsely punctate 

 centrally. 



Elytra oblong to oblong-oval about twice as long as wide; hase 

 scarcely emarginate, scarcely to slightly wider than the contiguous 

 prothoracic base; Iwcnievi slightly prominent and obtuse; sides evenly 

 and not strong!}' arcuate, apex not produced and rounded; disc 

 generall}' widest at or frequently behind the middle, more or less de- 

 pressed and convex, laterally always more or less broadly rounded 

 throughout, rather suddenly declivous posteriorly; surface more or 

 less striate and sulcate, more or less irregularly, nuiricately punctured. 



Epipleurw^ sterna^ and parapleurw more or less obsoletelj^ and 

 rather densely punctate, rugulose. The epipleurse are moderate in 

 width and not more suddenly widened beneath the humeri. 



Abdomen finely and more or less obsoletely punctate, rugulose; 

 fifth segment more densely punctate. 



Legs moderately long and quite stout ; anterior femora armed in 

 the sexes; anterior tarsi with the first joint (Plate 8. figs. 8 and 9) 

 thickened and slightly produced at apex beneath, groove obliterated, 

 the produced tip bearing a tuft of more or less golden (fresh speci- 

 mens) modified spinules; other joints with the plantar groove entire, 

 with the usual apico-ventral tufts of spinules separated by the 

 groove; similar in the sexes. 



i 



