254 BULLETIN 14 5, UNITED STATES NATIONAL MUSEUM 



Pronotum slightly wider than long, about equal in width at base 

 and apex, and widest near middle; sides feebly arcuately rounded 

 from apical angles to behind middle, then more strongly narrowed to 

 near the base, where they are slightly sinuate, and the posterior 

 angles rectangular; when viewed from the side the marginal carina 

 is strongly sinuate and deflexed anteriorly, the submarginal carina 

 feebly sinuate, and the two carinae rather widely separated for their 

 entire length, but more strongly anteriorly; anterior margin rather 

 strongly sinuate, with the median lobe strongly, broadly rounded; 

 base feebly, broadly emarginate at middle of each elytron, the median 

 lobe broadly rounded, and subtruncate in front of scutellum; disk 

 moderately convex, with a vague, broad median depression anteri- 

 orly, a broad, shallow depression on each side along the lateral mar- 

 gin, and with distinct, but not sharply defined prehumeral carinae; 

 surface coarsely, transversely rugose, sparsely, finely punctate be- 

 tween the rugae, and sparsely clothed with short, inconspicuous hairs, 

 especially at the sides. Scutellum strongly, transversely carinate, 

 and the surface finely, densely reticulate. 



Elytra about as wide as pronotum at base, and equal in width at 

 base and behind middle, feebly, broadly constricted near middle, and 

 obliquely narrowed posteriorly to the tips, which are separately, 

 rather narrowly rounded, and finely serrulate; sides of abdomen 

 rather broadly exposed above ; disk slightly flattened along the sutural 

 margins, which are slightly elevated posteriorly, and with broad, 

 shallow basal depressions; surface rather densely, coarsely imbricate- 

 punctate, and each elytron with a very indistinct longitudinal vitta 

 of sparsely placed, short, white hairs. 



Abdomen beneath finely, sparsely punctate, the punctures becom- 

 ing coarser, and more or less transversely connected by sinuate lines 

 on the basal segment, and sparsely clothed with short, recumbent, 

 whitish hairs ; first segment feebly flattened at the middle ; last seg- 

 ment broadly rounded at apex ; vertical portions of the segments not 

 conspicuously pubescent; pygidium sparsely punctate, but not dis- 

 tinctly longitudinally carinate. Prosternum finely, densely punctate, 

 and densely clothed with long, erect, whitish hairs, which extend 

 along middle of body to the abdomen ; prosternal lobe broad, strongly 

 declivous, and broadly rounded or vaguely sinuate in front; pros- 

 ternal process broad, the sides rather strongly expanded behind the 

 coxal cavities, and the apex with a distinct tooth at middle. Pos- 

 terior coxae with the posterior margin strongly sinuate, and the 

 exterior angle distinctly prolonged. Tibiae slender, and the anterior 

 and middle pairs armed with a short tooth on inner margin at apex. 

 Posterior tarsi shorter than tibiae, and the first joint as long as the 

 following three joints united. Tarsal claws similar on all feet, cleft 



