220 MISC. PUBLICATION' 4 70, U. S. DEPT. OF AGRICULTURE, 



Male. — Moderately elongate, slightly convex above, subopaque, uniformly 

 piceous, with a faint bronzy tinge; beneath piceous, with distinct purplish, 

 greenish, and bronzy reflections in different lights, and more strongly shining 

 than above. 



Head brownish cupreous, golden green along anterior margin of clypeus, with 

 a narrow, smooth, longitudinal carina on occiput; front flat; surface sub- 

 opaque, densely, finely granulose, densely, coarsely, shallowly ocellate-punctate, 

 sparsely, uniformly clothed with long, semierect, inconspicuous hairs; clypeus 

 broadly, deeply, angularly emarginate in front, truncate on each side. Antenna 

 brownish cupreous, with a faint bronzy tinge, gradually narrowed to apex; 

 intermediate segments subtriangular, as long as wide, broadly rounded at outer 

 margins ; third segment as long as following three segments united. 



Pronotum nearly twice as wide as long, slightly wider at base than at apex; 

 sides slightly sinuate and parallel from near apical angles to posterior angles; 

 anterior margin slightly sinuate, with a slightly rounded median lobe; base 

 broadly, arcuately emarginate on each side, median lobe strongly produced, 

 and truncate in front of scutellum; disk uniformly convex, without depressions 

 or callosities, but with a vague, irregular, longitudinal ridge on each side along 

 lateral margin ; surface finely, densely, deeply, uniformly punctate, intervals 

 densely, finely granulose. 



Elytra distinctly wider than pronotum at base, nearly twice as long as wide ; 

 sides nearly parallel from humeral angles to apical third, then arcuately con- 

 verging to tips, which are separately broadly rounded; lateral margins coarsely 

 serrate; basal depressions broad and deep; humeral depressions broad and 

 shallow ; surface glabrous, coarsely, confluently punctate, more or less rugose 

 basally, intervals finely, densely granulose. Each elytron with a more or less 

 distinct longitudinal costa along sutural margin on apical half, the costa oblit- 

 erated basally, and with three slightly depressed, more or less cupreous, discal 

 foveae, one at middle, the other two at apical third. 



Abdomen beneath coarsely, irregularly punctate, more densely at sides, 

 sparsely, irregularly clothed with short, recumbent, whitish hairs, without dis- 

 tinct, smooth, lateral callosities, intervals finely granulose ; last visible sternite 

 broadly, shallowly, arcuately emarginate at apex, with an indistinct sub- 

 marginal ridge on each side near apex, lateral margins not serrate ; eighth 

 tergite densely granulose, coarsely, densely punctate, broadly rounded at apex. 

 Prosternum coarsely, confluently, shallowly punctate, sparsely clothed with short, 

 erect, white hairs ; anterior margin with a very narrow, obscure, median lobe. 

 Anterior femur with a large, obtusely triangular tooth, which is coarsely 

 dentate on outer margin. Anterior and middle tibiae arcuate, unarmed; pos- 

 terior tibia straight. 



Length 8.5 mm., width 3.5 mm. 



Redescribed from the male lectotype in the United States National 

 Museum. 



Female. — Resembling the male very closely but differing from it in having the 

 head more deeply, coarsely punctate, and more sparsely pubescent, the last 

 visible sternite bisinuate at apex, with the submarginal ridge serrate and 

 strongly elevated behind the apex, and the eighth tergite confluently punctate. 



Type locality. — Miller's Canyon, Huachuca Mountains, Ariz. 



DISTRIBUTION 



From material examined : 



Arizona : Miller's Canyon, Huachuca Mountains, June- July, type series ; Palmer- 

 lee, Cochise County, July 15 (C. Schaeffer). 



Host. — The larval habits are unknown, but Charles Schaeffer col- 

 lected the adults by beating branches of canyon live oak (Quercus 

 chrysolepis Liebmann), which may be the host for this species. 



Scarcely any variation was observed in the few specimens ex- 

 amined, except in size, the length ranging from 8 to 10.5 mm. 



Schaeffer described the species from a series of specimens, without 

 designating a holotype, so the male cotype in the United States 



