246 BULLETIN 14 5, UNITED STATES NATIONAL MUSEUM 



bent, white hairs. Scutellum vaguely, transversely carinate, and the 

 surface finely, densely reticulate. 



Elytra slightly wider than pronotum at base, and equal in width 

 at base and apical third; sides nearly parallel for a short distance 

 behind base, broadly, feebly constricted in front of middle, arena tely 

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

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

 of abdomen broadly exposed above; disk feebly flattened, sutural 

 margins rather strongly elevated behind the middle, and with broad, 

 shallow, basal depressions; surface finely, densely imbricate-punc- 

 tate, sparsely clothed with indistinct hairs, and each elytron orna- 

 mented with a vague vitta of short white hairs, extending from the 

 basal depression to apex. 



Abdomen beneath finely, sparsely punctate, the punctures more or 

 less connected transversely by sinuate lines, which are coarser on the 

 basal segment, and rather densely, uniformly clothed with moderately 

 long, recumbent, white hairs; first segment feebly, longitudinally 

 concave, and clothed with longer and more erect hairs at the middle ; 

 vertical portions of the segments rather densely clothed with long, 

 recumbent, white hairs; pygidium feebly, longitudinally carinate, 

 but the carina not projecting. Presternum coarsely, sparsely punc- 

 tate, more or less rugose, and moderately clothed with long, erect, 

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

 subtruncate in front; prosternal process broad, 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 small tooth on the inner margin at apex. Posterior tarsi about 

 as long as the tibiae, and the first joint as long as the following two 

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

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



Length, 5.75 mm. ; width, 1.5 mm. 



Female. — Differs from the male in being more robust, front of 

 head slightly broader, sides of abdomen more broadly exposed above; 

 presternum without long, erect hairs; first abdominal segment convex 

 at middle, and the tibiae without a distinct tooth at apex. 



Length, 8 mm.; width, 2.1 mm. 



Type locality. — Huachuca Mountains, Ariz. 



Other localities. — Baboquivaria Mountains, Ariz. 



Type.— Cat. No. 41008, U.S.N.M. Allotype, collection of J. N. 

 Knull ; pamtype, collection of H. C. Fall. 



Described from three examples — one male and two females. The 

 type collected at the type locality by M. Chrisman, the allotype col- 

 lected at the same locality, July 28, 1907, by J. S. Hine, and the 

 female paratope collected in the Baboquivaria Mountains, Ariz., by 

 F. H. Snow. ' 



