266 BULLETIN 14 5, UNITED STATES NATIONAL MUSEUM 



terior margin slightly sinuate, and the median lobe feebly, broadly 

 rounded; base arcuately emarginate at middle of each elytron, the 

 median lobe strongly produced, and broadly emarginate in front of 

 scutellum; disk moderately convex, with a narrow median depression 

 extending from near the anterior margin to the base, and broader and 

 more deeply depressed behind the middle, with a broad, vague depres- 

 sion on each side along the lateral margin, and with very vague, 

 obtuse, prehumeral carinae; surface densely, finely granulose, finely, 

 distantly, and irregularly rugose, finely, sparsely punctate between 

 the rugae, and clothed with a few scattered hairs. Scutellum trans- 

 versely, arcuately carinate, and the surface finely, densely reticulate. 



Elytra about as wide as pronotum at base, and slightly wider at 

 base than at apical third ; sides feebly expanded for a short distance 

 behind base, broadly, vaguely constricted in front of middle, vaguely 

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

 which are separately, narrowly rounded, and coarsely serrulate; sides 

 of abdomen broadly exposed above ; disk slightly flattened, more or 

 less broadly depressed along the sutural margins, which are strongly 

 elevated at apical third, and with broad, shallow, basal depressions ; 

 surface coarsely, densely imbricate-punctate, and each elytron orna- 

 mented with three vague pubescent spots, one in the basal depression, 

 one in front of middle, and one at apical third. 



Abdomen beneath sparsety, finely punctate, the punctures con- 

 nected transversely by sinuate lines, which are coarser on the basal 

 segments, and sparsely, uniformly clothed with short, recumbent, 

 white hairs; first segment slightly flattened, and clothed with a few 

 longer hairs at the middle; vertical portions of the segments not 

 conspicuously pubescent; pygidium not carinate posteriorly. Pres- 

 ternum finely, densely punctate, somewhat rugose, and sparsely 

 clothed with moderately long, semierect, white hairs ; prosternal lobe 

 broad, moderately declivous, and broadly subtrimcate in front ; pros- 

 ternal process broad, vaguely expanded behind the coxal cavities, then 

 abruptly narrowed to the apex, which is acute. Tibiae slender, 

 straight, and the anterior and middle pairs armed with a very small 

 tooth on inner margin at apex. Posterior tarsi slightly shorter than 

 the tibiae, and the first joint not as long as the following two joints 

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

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



Female. — Differs from the male in having the front of head uni- 

 formly coppery red and not granulose, the first abdominal segment 

 convex at middle, the presternum clothed with short, recumbent hairs, 

 and the tibiae without a distinct tooth at apex. 



Length, 4.75 mm.; width, 1.25 mm. 



Type locality. — Brownsville, Tex. 



Type and allotype. —Cat. No. 41013, U.S.N.M. 



