22 PROCEEDINGS OF THE NATIONAL MUSEUM vol. C6 



the lateral carina sharply defined, extending arciiately from the pos- 

 terior angle to the lateral margin at middle; surface feebly irregu- 

 larly rugose, finely, densely granulose, and finely, deeply and ir- 

 regularly punctate, and clothed with a few scattered cinereous 

 hairs. Scutellum strongly transversely carinate, and strongly acu- 

 minate at apex ; surface finely and densely reticulate. Elytra slightly 

 wider than pronotum at base, and strongly acuminate posteriorly; 

 sides feebly arcuately expanded behind the humeral angles for a 

 short distance, broadly arcuately constricted near middle, feebly 

 broadly expanded at apical third, then obliquely attentuate to the 

 tips, which are separately acutely rounded, strongly dentate, and 

 each elytron terminating in a short spine at the middle; sides of 

 abdomen narrowly exposed above; disk feebly convex, and each ely- 

 tron with a broad, moderately deep basal depression, and with a 

 moderately deep longitudinal depression along the sutural margin, 

 which is feebly elevated posteriorly; surface rather finely and very 

 densely imbricate-punctate. Abdomen beneath finely and rather 

 densely punctate, and more or less transversely striolate, sparsely 

 clothed with short recumbent cinereous hairs, and with a slightly 

 denser pubescent spot at the sides of the segments; intervals finely 

 obsoletely reticulate; first segment strongly compressed laterally, 

 with a strongly elevated, transversely arcuate median carina at 

 apex; last segment broadly subtruncate at apex, with the apical 

 groove feebly emarginate at middle; vertical portion of the seg- 

 ments not conspicuously pubescent; pygidium with a strongly pro- 

 jecting carina at apex, the carina truncate at tip. Prosternum 

 densely, coarsely scabrous, and sparsely clothed with moderately 

 long semi-erect cinereous hairs; posternal lobe broadly rounded in 

 front, and moderately declivous; prosternal process rather broad, 

 sides feebly arcuately emarginate to behind the coxal cavities, where 

 they are expanded, then abruptly narrowed to the apex, which is 

 acute. Femora robust, the anterior pair with a few obsolete teeth 

 on the inner margin near apex. Tibae slender ; anterior pair strongly 

 arcuate, with a sharp curved spine on inner margin at apex ; middle 

 pair feebly arcuate, with a similar tooth at apex; posterior pair 

 straight, more or less flattened, and feebly expanded at apex. Pos- 

 terior tarsi two-thirds as long as the tibiae, and the first joint about 

 equal in length to the following three joints united. Tarsal claws 

 dissimilar, anterior and middle claws feebly cleft at apex, formmo- 

 two short teeth of equal length; posterior claws cleft near middle, 

 the inner tooth slender, not quite as long as outer one, and not turned 

 inward. 



Female. — Differs from the male in having the head a little more 

 convex, and the surface a little more coarsely punctate, pubescence 

 on elytra more cinereous, abdomen with the first segment regularly 



