44 MISC. PUBLICATION 470, U. S. DEPT. OF AGRICULTURE 



Male. — Broadly elongate, moderately convex above, feebly shining, uniformly 

 brownish cupreous; beneath cupreous, with a distinct greenish tinge, and more 

 strongly shining than above. 



Head bright green in front, cupreous and aureous on vertex and occiput, 

 with a vague, narrow chevron on vertex and a distinct longitudinal carina 

 on occiput ; front nearly flat, with two vague callosities ; surface rather densely 

 punctate, more coarsely, confluently on occiput, rather densely clothed with 

 long, recumbent, white hairs, the intervals smooth ; clypeus broadly, arcuately 

 emarginate in front, arcuately rounded on each side. Antenna uniformly 

 bronzy green, robust, short, vaguely narrowed to apex; intermediate segments 

 not compact, as wide ajs long, broadly rounded at outer margins ; third 

 segment slightly shorter than the following two segments united. 



Pronotum nearly twice as wide as long, subequal in width at base and apex, 

 widest along middle; sides nearly parallel (feebly, arcuately converging ante- 

 riorly) to behind middle, slightly, arcuately constricted at posterior angles, 

 which are nearly rectangular ; anterior margin slightly sinuate, with a broad, 

 feebly rounded, median lobe ; base broadly, angularly emarginate on each side, 

 the median lobe broadly rounded ; disk moderately convex, more or less vaguely 

 depressed anteriorly, with four smooth, irregular callosities arranged trans- 

 versely in front of middle, and a smooth, indistinct, median line in front 

 of scutellum ; surface coarsely, confluently punctate, sparsely clothed with long, 

 fine, recumbent, white hairs. 



Elytra at base slightly wider than pronotum at middle, twice as long as 

 wide; sides nearly parallel from humeral angles to behind middle (vaguely 

 expanded behind middle), then arcuately converging to tips, which are sepa- 

 rately broadly rounded ; lateral margins slightly serrate posteriorly ; basal 

 depressions deep ; humeral depressions broad and very shallow ; surface coarsely, 

 scabrously punctate, rather densely clothed with short, semierect, white hairs. 

 Each elytron with four more or less smooth, longitudinal lines ; first parallel 

 with sutural margin, extending from basal fovea to apex; second strongly 

 sinuate, extending from near base to near apex; third short, extending from 

 basal third to apical third; and the fourth following outline of lateral margin, 

 extending from humeral angle to near apex; and with two very indistinct 

 discal foveae of the same color as surface of elytron, one on second smooth 

 line at basal third, the other at apical third between second and third smooth 

 lines. 



Abdomen beneath finely, densely punctate, slightly, transversely rugose, rather 

 densely, uniformly clothed with moderately long, recumbent, white hairs, without 

 lateral callosities, the intervals finely granulose; last visible sternite broadly, 

 shallowly, arcuately emarginate at apex, without a submarginal ridge, lateral 

 margins finely serrate; eighth tergite broadly rounded at apex, densely punc- 

 tate, but not longitudinally carinate. Prosternum coarsely, confluently punc- 

 tate, rather densely clothed with long, semierect, wh : te hairs; anterior margin 

 deflexed, with a wide, short, median lobe. Anterior femur with a large, 

 acutely triangular tooth, which is strongly dentate on outer margin. Anterior 

 and middle tibiae slightly arcuate, the former with a small, rounded dilation 

 near apex ; posterior tibia straight. 



Length 9.25 mm., width 3.75 mm. 



Redescribed from the male lectotype, No. 3440, in the Academy of Natural 

 Sciences of Philadelphia. 



Female. — Differing from the male in having the head uniformly brownish 

 cupreous, and more coarsely punctured, the antenna uniformly piceous, the 

 prosternum more coarsely and sparsely punctured, the last visible sternite 

 longer, broadly rounded and slightly sinuate at apex, the middle tibia straight, 

 and the anterior tibia unarmed near the apex. 



Type locality. — Mojave Desert, Calif. 



DISTRIBUTION 



From material examined : 



California: Mojave Desert, lectotype (Horn collection). Kernville, May 14, 

 1930 (E. G. Linsley). Palm Springs, July 1936, reared (J. D. Maple). 

 Lone Pine, Inyo County, June 1937 (C. D. Michener). Buttonwillow, May 

 29, 1936. 



Utah: St. George, July (H. F. Wickham). 



