6 PROCEEDINGS OF THE NATIONAL MUSEUM vol.82 



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

 base and behind middle; sides parallel for a short distance behind 

 base, broadly, arcuately constricted near middle, arcuately expanded 

 behind middle, then obliquely narrowed to the tips, which are sep- 

 arately narrowly rounded, and finely serrulate; sides of abdomen 

 broadly exposed above ; disk feebly flattened, the sutural margins 

 rather strongly elevated toward apices, and with broad, deep, basal 

 depressions; surface densely, coarsely imbricate-punctate, each ely- 

 tron ornamented with a broad, vague vitta along the sutural margin, 

 extending from the basal depression to near the apex, and composed 

 of sparsely placed, short, semierect, white hairs. 



Abdomen beneath sparsely marked with more or less transverse, 

 crenulate lines, which are coarser on basal segment, sparsely, finely 

 punctate, sparsely, uniformly clothed with short, semierect, white 

 hairs; first segment strongly convex at middle, the suture between 

 the first and second segments not distinct at the sides; last segment 

 broadly rounded at apex; vertical portions of segments not con- 

 spicuously pubescent; pygidium rounded at apex, coarsely punctate, 

 and without a projecting carina. Prosternum coarsely, densely 

 rugose, and rather densely clothed with rather long, semierect, 

 white hairs; prosternal lobe broad, strongly declivous, and broadly, 

 arcuately rounded in front; prosternal process broad, the sides par- 

 allel, and broadly truncate at apex. Tibiae slender, straight, and 

 unarmed at apices. Posterior tarsi short, about one half as long as 

 the tibiae, the first joint as long as the following two joints united. 

 Anterior and middle tarsal claws cleft near the middle, the inner 

 tooth much shorter than the outer one, and not turned inward. 

 (Claws missing on posterior tarsi.) 



Male. — Differs from the female in having the front of the head 

 narrower, the prosternum densely clothed with long, erect, white 

 hairs at the middle, the first and second abdominal segments feebly, 

 longitudinally depressed and clothed with longer and more erect hairs 

 at the middle, and the tarsal claws dissimilar; the anterior and 

 middle ones deeply cleft, with the teeth acute at the tips and nearly 

 equal in length, the posterior ones cleft near the middle, with the 

 inner tooth broad, much shorter than the outer one, and not turned 

 inward. 



Length, 7-8 mm; width, 1.75-2 mm. 



Type locality. — Tejupilco, Mexico, D.F. 



r^/T^e.— U.S.N.M. No. 49553. 



Allotype. — In the H. E. Hinton collection. 



Remarks. — Described from a male and a female (female type) 

 collected at the type locality at an altitude of 3,960 feet, during July 

 1932, by H. E. Hinton. 



