8 PROCEEDINGS OF THE NATIONAL MUSEUM vol.82 



broadly, arcuately constricted in front of middle, arcuately expanded 

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

 arately narrowly rounded and finely serrulate ; sides of abdomen only 

 vaguely exposed above; disk rather strongly flattened, the sutural 

 margins feebly elevated behind the middle, and with broad, mod- 

 erately deep, basal depressions; surface very finely, densely imbri- 

 cate-punctate, sparsely, uniformly clothed with short, inconspicuous 

 hairs. 



Abdomen beneath finely, densely granulose, sparsely, feebly punc- 

 tate, with transverse, crenulate lines, which are coarser on basal 

 segment, sparsely, uniformly clothed with short, recumbent, white 

 hairs, and ornamented with long, recumbent, golden-yellow pubes- 

 cence as follows : A rather broad vitta along the lateral margins of 

 the first and second segments, and a large spot on each side near 

 lateral margin on the third and fourth segments; 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 conspicuously pubescent; 

 pygidium coarsely, densely punctate, longitudinally carinate, but 

 the carina not projecting at apex. Presternum densely, coarsely 

 rugose, sparsely clothed with rather short, semierect, white hairs on 

 the median part, and densely clothed at the sides with long, recum- 

 bent, golden-yellow pubescence; prosternal lobe broad, strongly de- 

 clivous, rather deeply, broadly, arcuately emarginate in front; pro- 

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

 then arcuately narrowed to the apex, which is acutely rounded. 

 Mesosternum and metasternum clothed at the sides with long, re- 

 cumbent, golden-yellow pubescence. Tibiae slender, straight, un- 

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

 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 

 broader and shorter than the outer one, and not turned inward. 



Length, 9-9.5 mm ; width, 2.25-2.5 mm. 



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



Type and paratype. — U.S.N.M. No. 49554. 



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



Remarks. — Described from five females (one type) collected at the 

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

 H. E. Hinton. 



This species resembles opacipennis Waterhouse, bat it differs from 

 that species in having the golden-yellow pubescence extending over 

 the basal half of the pronotum, and in having a round swelling re- 

 placing the prehumeral carina. 



