18 PKOCEEDINGS OF THE NATIONAL MUSEUM vol.82 



angle, "vvith a vague, median depression extending from base to near 

 anterior margin, and with sharply defined, arcuate, prehumeral 

 carina, the carina close to lateral margin and connected to it near 

 the middle ; surface coarsely but not deeply rugose, the rugae trans- 

 verse on disk, finely, sparsely punctate between the rugae, and nearly 

 glabrous. Scutellum strongly, transversely carinate, the surface 

 finely, densely reticulate. 



Elytra about as wide as pronotum at base, subequal in width at 

 base and behind middle; sides slightly expanded behind base, 

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

 expanded behind middle, then obliquely narrowed to the tips, which 

 are separately narrowly rounded and rather coarsely serrulate ; sides 

 of abdomen broadly exposed above; disk rather strongly flattened 

 along sutural margins, which are feebly elevated posteriorly, and 

 Vt'ith broad, moderately deep, basal depressions; surface densely, 

 finely imbricate-punctate, each elytron ornamented with a narrow 

 v'itta of sparse, short, white hairs extending along the sutural margin 

 from basal depression to apex. 



Abdomen beneath densely marked with transverse, crenulate lines, 

 which are coarser at sides of basal segment, finely, sparsely punc- 

 tate, and sparsely, uniformly clothed with short, recumbent, white 

 hairs, which are longer and more erect on apical segment; first seg- 

 juent strongly convex at middle, the suture between first and second 

 segments not indicated at the sides; last segment broadly rounded 

 at apex; vertical portions of the segments not conspicuously pubes- 

 cent; pygidium sparsely, coarsely punctate, longitudinally carinate, 

 but the carina not projecting at apex. Prosternum feebly rugose, 

 sparsely punctate, and sparsely clothed with moderately long, semi- 

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

 subtruncate or vaguely emarginate in front; prosternal process 

 broad, the sides parallel to behind the coxal cavities, then subtrun- 

 cate to the median tooth, which is acute. Tibiae slender, the an- 

 terior and middle pairs armed with a small tooth on inner margin at 

 apices. Posterior tarsi more than one half as long as the tibiae, the 

 first joint as long as the following two joints united. Tarsal claws 

 similar on all feet, cleft near the middle, the teeth subequal in length, 

 slender, acute at tips, the inner one turned inward and the tip nearly 

 touching that of the opposite side. 



Length, 5.Y6-6.5 mm; width, 1.3-1.5 mm. 



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



rype.— U.S.N.M. No. 49560. 



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



Remarks. — Described from two males (one type) collected at the 

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

 Hinton. 



