16 PROCEEDINGS OF THE NATIONAL. MUSEUM vol. 66 



more greenish, and thei tarsi piceous; antennae aeneous at base, 

 becoming purplish toward apex. 



Head with the front rather wide, nearly flat, the sides nearly 

 parallel, and without any distinct depressions; surface densely, 

 coarsely granulose, and densely, coarsely rugose or scabrous on the 

 front, becoming coarsely longitudinally rugose on the occiput, and 

 very sparsely clothed with rather long cinereous hairs behind the 

 epistoma; epistoma wide between the antennae, and broadly, but 

 not deeply emarginate in front; antennae rather short, reaching 

 to middle of pronotum, and serrate from the fourth joint. Prono- 

 tum one and one-fourth times as wide as long, distinctly wider in front 

 than behind, and widest along apical half; sides nearly parallel to 

 middle, then arcuately narrowed to near the posterior angles, where 

 they are feebly expanded, when viewed from the side the two margins 

 are strongly sinuate, separated anteriorly, and connected to each 

 other at basal third; anterior margin strongly arcuately emargin- 

 ate, with a broadly rounded median lobe; base feebly emarginate 

 at middle of each elytron, and with a broadly rounded median lobe ; 

 disk moderately convex, with two round, moderately deep median 

 depressions, and more or less broadly depressed along the sides and 

 at base, the lateral carina rather sharply defined, straight, and ex- 

 tending from the posterior angle to near the middle; surface rather 

 irregularly rugose, the intervals finely, irregularly punctate, and 

 finely, densely granulose, and sparsely clothed with cinereous 

 pubescence in the depressed areas at sides. Scutellum strongly 

 transversely carinate, and strongly acuminate at apex ; surface finely 

 and densely reticulate. Elytra distinctly wider than pronotum at 

 base; sides parallel for a short distance behind base, broadly 

 arcuately constricted at basal third, arcuately expanded at apical 

 third, then obliquely attenuate to the tips, which are separately 

 obtusely rounded, and strongly, regularly dentate ; sides of abdomen 

 covered by elytron; disk feebly convex, and each elytron with a 

 broad, rather deep basal depression, and with an obsolete longi- 

 tudinal depression along sutural margin, the depression more deeply 

 impressed from basal fourth to middle, and the suture feebly elevated 

 posteriorly; surface coarsely and densely imbricate-punctate. Ab- 

 domen beneath sparsely, coarsely and obsoletely punctate, becom- 

 ing more or less transversely striolate at sides of basal segment, 

 sparsely clothed with short recumbent hairs, and with a more densely 

 pubescent spot at sides of third segment ; intervals finely and densely 

 reticulate; first segment feebly convex, and sparselj'^ clothed with 

 long, fine, erect hairs at the middle; last segment broadly rounded 

 at apex, with the apical groove rounded at middle; vertical portion 

 of the segments not conspicuously pubescent; pygidium without 

 a median carina at apex. Prosternum coarsely, rather densely scab- 

 rous, and densely clothed with vei-y fong, erect, inconspicuous hairs ; 



