A REVISION OF NORTH AMERICAN CHRYSOBOTHRINI 91 



coarsely, confluently punctate, more or less rugose, rather densely clothed with 

 long, erect, inconspicuous hairs ; clypeus broadly, shallowly, arcuately emar- 

 ginate in front, broadly rounded on each side. Antenna brownish cupreous, 

 gradually narrowed to apex ; intermediate segments compact, as long as wide, 

 subtruncate at outer margins; third segment nearly as long as following two 

 segments united. 



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

 widest along middle ; sides nearly parallel at middle, arcuately converging at 

 base and apex ; anterior margin slightly sinuate, with a vague, broadly rounded, 

 median lobe ; base arcuately emarginate on each side, median lobe strongly pro- 

 duced, and truncate in front of scutellum ; disk moderately convex, with a vague, 

 longitudinal, median sulcus; surface rather finely, sparsely, irregularly punc- 

 tate at middle, coarsely, confluently punctate at sides, intervals nearly smooth. 



Elytra slightly wider than pronotum, twice as long as wide; sides nearly 

 parallel from humeral angles to behind middle, then arcuately converging to 

 tips, which are separately broadly rounded; lateral margins coarsely serrate; 

 basal depressions very deep; humeral depressions broad and shallow; surface 

 glabrous, densely, coarsely, irregularly punctate. Each elytron with four more 

 or less distinct, smooth, longitudinal costae ; first straight, extending from apex 

 to base, strongly elevated posteriorly, more depressed and forming broad spaces 

 toward base; second strongly interrupted and forming broad, smooth spaces; 

 third sinuate, extending from near humerus to second costa at apical fourth, 

 and interrupted behind middle; fourth scarcely indicated, following outline of 

 lateral margin. 



Abdomen beneath coarsely, sparsely, irregularly punctate, more densely punc- 

 tate at sides, sparsely clothed with rather short, erect, white hairs, with more or 

 less distinct, smooth, lateral callosities, intervals obsoletely granulose ; last 

 visible sternite semicircularly emarginate at apex, with a slightly elevated, 

 dentate, submarginal ridge, lateral margins coarsely serrate; eighth tergite 

 densely granulose, coarsely, sparsely punctate, deeply, narrowly, angularly emar- 

 ginate at apex, but not longitudinally carinate. Prosternum smooth at middle, 

 coarsely, densely punctate toward sides, sparsely clothed with long, erect, white 

 hairs; anterior margin broadly rounded, with a short, wide, median lobe. An- 

 terior femur with a large, obtuse tooth, which is coarsely dentate on outer margin. 

 Anterior and middle tibiae arcuate, the former with a broad dilation, which is 

 abruptly narrowed near the apex, strongly constricted behind the dilation ; pos- 

 terior tibia straight. 



Length 11.5 mm., width 4.75 mm. 



Redescribed from a male in the United States National Museum, 

 -collected in Texas by Belfrage. 



Female. — Differing from the male in having the prosternum more sparsely 

 punctured and less densely pubescent, the last visible sternite narrowly notched 

 .at apex, the eighth tergite broadly rounded and denticulate at apex, the midd'e 

 tibia nearly straight, and the anterior tibia unarmed near apex. 



Type locality. — "Texas." Type not examined, recorded as being in 

 the TJlke collection in Pittsburgh. 



DISTRIBUTION 



From material examined : 



Arizona: Pine Dale, July 18. White Mountains, August-September (D. K. 



Duncan). Grand Canyon, March 30, 1935; Oak Canyon, November 22, 1935, 



reared (D. De Leon). 

 California: Los Angeles County (D. W. Coquillett). 

 Colorado: Estes Park, August 2, 1938 (D. De Leon). 

 Nebraska: Stapleton, June 8, 1938, reared (N. D. Wygant). 

 New Mexico: Santa Fe, July 14, 1900 (J. F. Wielandy) ; June (T. D. A. 



Cockerell). Coolidge (H. F. Wickham). 

 Texas: No definite locality (Belfrage). Sabinal, April to May, 1910 (F. C. 



Pratt). Kerrville (H. Lacy). Dallas, September 23, 1926 (W. B. Wood). 

 Utah: Parowan, June 15, 1935 (C. S. Sorenson). South Creek, Beaver County, 



June 22. Delle, July 2, 1930 (G. F. Knowlton). Mt. Carmel, April 11, 1935, 



reared (D. De Leon). 



