38 H. C. FALL. 



This is one of our largest species, and one of the commonest 

 throughout its range, which includes the entire Rocky Moun- 

 tain region, extending to the Pacific Coast in the north. The 

 following localities are represented in the material seen: Van- 

 couver; Victoria; Washington (type series) ; Oregon; California 

 — no specific locality but doubtless from the northern or north- 

 eastern part of the State; Idaho (Cceur d'Alene) ; Utah; Mon- 

 tana (Helena) ; Wyoming (National Park) ; Colorado (Canon 

 City, Denver, Golden, Colorado Springs, Graham's Park, 

 Silver Plume, Leadville, Veta Pass) ; New Mexico (Pecos, Las 

 Vegas Hot Springs, San Geronimo, Aztec, Beulah, Cloudcroft) ; 

 Arizona (Williams, Flagstaff, Huachuca Mountains). 



23. D. semifoveata n. sp. 



Elongate, subparallel, dark brown, prothorax polished, elytra finely 

 alutaceous, moderately shining. Mentum broadly concave in more 

 than anterior half, without arcuate raised line or setae. Front feebly 

 impressed or bi-impressed at middle, post-clypeal convexity evident but 

 not strong; clypeal suture smooth, strongly impressed; clypeal margin 

 feebly sinuate at middle; punctuation of head moderately strong and 

 close, the punctures separated by their own diameters or less, except 

 at' middle of vertex, denser on the clypeus. Prothorax short, twice 

 as wide as long, sides broadly arcuate and convergent in front, 

 slightly rounded in basal two-fifths, disk somewhat irregularly not very 

 closely punctate; front angles evidently but not very conspicuously 

 impressed. Elytra three and one-half times as long as the prothorax 

 and nearly one-half longer than wide; costas flat, distinctly limited, 

 the wider intervals closely confusedly punctate, the first barely three 

 times as wide as the sutural interval; punctures of sutural and costal 

 intervals more numerous and irregular than usual, those of the lateral 

 interspaces less evidently smaller than the strial punctures. Body 

 beneath nearly smooth at middle, moderately punctate at sides. 

 Upper tooth of front tibia about three-fourths as far from base as from 

 apex; ungual tooth slightly post-median, rather broad and obliquely 

 truncate, its tip about three-fourths as far from the end as from the 

 base of the claw. Length 9.4-9.8 mm.; width 4.65-5 mm. 



Arizona. — Huachuca Mountains, Schaeffer and Skinner. 



24. D. parvicollis n. sp. 



Less elongate than semifoveata, red-brown, moderately shining, the 

 elytra minutely alutaceous. Structure of mentum nearly as in 

 brevicollis. Head finely sparsely punctate, the punctures on the 

 front separated by from one to three times their own diameters; post 



