214 MISC. PUBLICATION 4 70, U. S. DEPT. OF AGRICULTURE? 



slightly narrowed to apex; intermediate segments compact, subtriangular, as 

 long as wide, subtruncate at outer margins ; third segment as long as following 

 three segments united. 



Pronotum twice as wide as long, slightly narrower at apex than at base, widest 

 near apex ; sides arcuately converging at apical angles, obliquely converging and 

 Slightly sinuate from near angles to posterior angles; anterior margin slightly, 

 broadly, arcuately emarginate, without a distinct median lobe; base broadly, 

 arcuately emarginate on each side, median lobe slightly produced, and broadly 

 truncate in front of scutellum ; disk slightly flattened at middle, on each side 

 a very shallow, oblique depression near apical angle, and a round, indistinct de- 

 pression near base ; surface rather sparsely, irregularly punctate at middle, more 

 densely and coarsely punctate at sides, with a smooth median line, and an incon- 

 spicuous, smooth space on each side near anterior margin and median line. 

 Scutellum short, triangular. 



Elytra distinctly wider than pronotum, widest at apical third, nearly twice as 

 long as wide ; sides slightly diverging from humeral angles to apical third, then 

 obliquely converging to tips, which are conjointly broadly rounded, lateral margins 

 slightly serrate posteriorly; basal depressions broad and deep; humeral depres- 

 sions indistinct ; surface glabrous, finely, irregularly punctate, more densely in 

 the foveae. Each elytron with four more or less distinct longitudinal costae; 

 first straight, extending from base to apex, strongly elevated posteriorly ; second 

 sinuate, slightly elevated, interrupted in front of middle and at apical third by 

 foveae ; third short, indistinct, interrupted by foveae ; fourth irregularly elevated, 

 following outline of lateral margin ; and with two slightly depressed, transverse, 

 irregular foveae, one just in front of middle, the other at apical third. 



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

 sparsely clothed with short, recumbent, whitish hairs, without distinct lateral 

 callosities, intervals obsoletely granulose ; basal sternite broadly flattened at mid- 

 dle ; last visible sternite semicircularly emarginate at apex, angles narrowly, ob- 

 liquely truncate; with a slightly elevated, serrate, submarginal ridge, lateral 

 margins not serrate ; eighth tergite coarsely, sparsely punctate, broadly rounded at 

 apex. Prosternum coarsely, sparsely punctate at middle, more densely at sides and 

 along anterior margin, sparsely clothed with short, recumbent, whitish hairs ; an- 

 terior margin truncate, without a median lobe. Anterior femur with a short, 

 obtuse tooth, which is not distinctly dentate on outer margin. Anterior tibia 

 strongly arcuate, with a small, rounded tooth near apex; anterior and middle 

 tibiae with numerous small teeth on inner margins, the middle tibia strongly 

 arcuate and the posterior one straight. 



Length 15 mm., width 6.5 mm. 



Redescribed from the male type in the United States National 

 Museum. 



Female. — Differing from the male in having the front of the head more con- 

 vex, uniformly purplish brown, more coarsely punctate, and with numerous ir- 

 regular, smooth callosities, the last visible sternite more elongate, broadly, shal- 

 lowly, arcuately emarginate at apex, with a distinct, serrate, preapical ridge, the 

 anterior and middle tibiae slightly arcuate, and all the tibiae unarmed on inner 

 margins. 



Type locality. — Beaver Canyon, Utah. 



DISTRIBUTION 



From material examined. 



Arizona: Williams, June 10 to July 29 (Barber and Schwarz). 



Colorado: North Cheyenne Canyon, August 10, 1916 (Geo. Hofer). Manitou, 



July 19, 1900 (H. F. Wickham). 

 New Mexico: Albuquerque, June 16, 1909 (F. C. Pratt). Las Vegas. 

 Utah: Beaver Canyon, July 1904, type (Jacob Doll). "S. W. Utah" (Brooklyn 



Museum collection). 



Schaeffer (1909) records the species as having been collected at Oak 

 Creek, Ariz., by Professor Snow. 



Hosts. — Nothing is known of the larval habits of this species, but 

 the adults have been collected by George Hofer in Colorado, and by 

 Barber and Schwarz in Arizona on the Rocky Mountain white oak 



