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



Eedescribed from the male type in the collection of H. C. Fall. 



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

 cupreous brown, more coarsely punctate, more sparsely pubescent, and the 

 smooth callosities larger, the presternum more coarsely punctate and sparsely 

 pubescent, the antenna cupreous, the last visible sternite broadly, but not 

 deeply, arcuately emarginate at apex, the eighth tergite coarsely, densely 

 punctate, and the anterior tibia unarmed at apex. 



Type locality. — San Jacinto Mountains, Calif. 



DISTEIBTJTION 



From material examined : 



Albeeta: Banff, Cascade Mrs., 7,000 to 8.000 feet, July 25, 1925 (Owen Bryant). 

 Beitish Columbia: Merritt, Midday Valley, June 1925 (K. F. Auden). 

 California: Los Angeles County (D. W. Coquillett). Yosemite ; Los Gatos 



(R. D. Hartman). Meyers, September 5, 1916; Placerville, May 12, 1918 



(F. B. Herbert). San Jacinto Mountains, 6,000 feet, May 24, 1908, type 



(F. Grinnell, Jr.). 

 Colorado: Long Peak, August (T. D. A. Cockerell). Estes Park, June 10, 1934 



(E. B. Andrews). Lump Gulch, near Gilpin. July 27, 1934 (H. G. Rodeck). 



Glacier Lake, Boulder County, June 27, 1936 (Helen Rodeck). 

 Idaho: Smith Ferry, August 21, 1916 (A. C. Burr ill). 

 Oeegon: Anthony Lake, Blue Mountains, 7,100 feet, August 6, 1929 (H. A. 



Scullen). 

 Wyoming: Yellowstone National Park, August 2, 1907 (W. Robinson). 



Also recorded in the literature from : 



Califobnia : California Sierras, above Lake Tahoe. and San Bernardino Moun- 

 tains (Fall 1910). Weed, July-August (Chamberlin 1917). Fallen Leaf 

 Lake, August; Green Valley, 8,000 feet, August 6; Tallac, July; Sierra 

 Madre, June; Humboldt County, June 19 (Chamberlin 1926). 



Oeegon: Warner Mountains, Lake County, June 19 (Chamberlin 1925). 



Hosts. — Fall (1910) mentions collecting an adult in its burrow in 

 the dead twig of western yellow pine (Firms ponderosa Lawson), 

 and Chamberlin (1917) records the species as breeding in lodgepole 

 pine (Pinus contorta Loudon). Adults have been examined that 

 were collected on western white pine (Pinus monticola T>. Don.) and 

 Jeffrey pine (Pinus jeffreyi "Oreg. Com."). 



The color in the depressed areas on the upper surface of the body 

 varies from bronzy green through brownish cupreous to lilacinous, 

 and on freshly collected specimens the surface is more or less covered 

 with a white efflorescence. The clypeus is angularly or arcuately 

 emarginate in front, and sometimes in the males the head is more 

 greenish toward the clypeus. Occasionally the interior margin of 

 the pronotum is slightly lobed at the middle. The length is from 

 12 to 15 mm. 



The specimens from Colorado, Wj 7 oming, and Alberta differ from 

 the typical specimens from California in having the dorsal surface 

 of the body smoother and the sculpture more irregular, the smooth 

 spaces on the elytra narrower and not so conspicuous, and the dila- 

 tion on the anterior tibia of the male more elongate and not so broadly 

 rounded. The male genitalia are a little more broadly rounded at 

 the sides in some specimens. 



