30 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 82 



but without distinct oval swellings or prehumeral carinae; surface 

 feebly, coarsely, irregular rugose, rather densely, coarsely punctate 

 between the rugae, sparsely, uniformly clothed with short, semierect, 

 white hairs. Scutellum without a transverse carina, the surface 

 vaguely reticulate. 



Elytra slightly wider than pronotum at base, subequal in width 

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

 base, broadly, deeply, arcuately constricted in front of middle, 

 broadly, arcuately expanded behind middle, then arcuately nar- 

 row^ed to the tips, which are separately narrowly rounded and finely 

 serrulate ; sides of abdomen not exposed above ; disk slightly convex, 

 without median costae, the sutural margins feebly elevated pos- 

 teriorly, and with broad, moderately deep, basal depressions; sur- 

 face densely, finely imbricate-punctate, sparsely, uniformly clothed 

 with short, semierect, inconspicuous hairs. 



Abdomen beneath densely marked with distinct, transverse, crenu- 

 late lines, imbricate toward the sides of basal segment, finely rather 

 densely punctate, and rather densely, uniformly clothed with short, 

 recumbent, whitish hairs ; first segment convex at middle, the suture 

 between first and second segments not indicated at the sides; last 

 segment broadlj^ rounded at apex ; vertical portions of the segments 

 not consi:)icuously pubescent; pygidium densely, coarsely punctate, 

 strongly carinate, but the carina not projecting at apex. Proster- 

 num more or less rugose, coarsely, rather densely punctate, sparsely 

 clothed with short, semierect, white hairs; prosternal lobe broad, 

 strongly declivous, broadly, transversely subtruncate in front, pro- 

 sternal process broad, the sides parallel to behind the coxal cavities, 

 then obliquely narrowed to the apex, which is acute. Tibiae slender, 

 the anterior and middle pairs slightly arcuate and armed with a 

 very small tooth on inner margin at apices. Posterior tarsi slightly 

 shorter than tibiae, the first joint as long as the following three 

 joints united. Tarsal claws similar on all feet, cleft near the middle, 

 the inner tooth broad, distinctly shorter than outer one, and not 

 turned inward. 



Length, 8.5 mm ; width, 2.5 mm. 



T7jpe locality. — Tejupilco. Mexico, D.F. 



Type.—V.S.'NM. No. 49567. 



Reiimrks. — Described from a unique male collected at the type 

 locality at an altitude of 3,960 feet, during July 1932, by H. E. 

 Hinton. 



This species resembles muticus LeConte, but it differs from that 

 species in having the antenna serrate from the fourth joint, the 

 pronotum strongly elevated near the posterior angles, and the elytra 

 without longitudinal costae. 



