152 MISC. PUBLICATION 4 7 0, U. S. DEPT. OF AGRICULTURE 



Redescribed from the male lectotype, No. 3435, in the Academy 

 of Natural Sciences of Philadelphia. 



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

 cupreous and more sparsely punctured, the antenna uniformly brownish cupreous, 

 the last visible sternite more elongate, and more narrowly emarginate at apex, 

 the eighth tergite rounded or slightly emarginate at apex, and more deeply, 

 confluently punctured, and the anterior and middle tibiae slightly arcuate and 

 unarmed near their apices. 



Type locality. — Colorado, no definite locality. 



DISTRIBUTION 



From material examined : 



Arizona: Flagstaff, July (H. F. Wickham, Barber and Schwarz). Williams and 

 Bright Angel, June- July (Barber and Schwarz). Kaibab National Forest, 

 August (H. F. Wickham). Grand Canyon, June 21, 1924 (G. Hofer). 

 Prescott, June- July (H. F. Wickham, M. W. Blackman). Santa Catalina 

 Mountains, reared (J. L. Webb). Carr Canyon, Huachuca Mountains, 

 9,000 feet, July-August (H. Skinner). 



Colorado: No definite locality (type). Ouray, 7,500 to 8,000 feet, July 1-15, 

 1897; Bailey, August 1890 (H. F. Wickham). 



New Mexico: Jemez Mountains, 9,000 feet, August 8, 1917 (J. Woodgate). 

 Pecos National Forest, August 22-24, 1916 (C. Heinrich). Las Vegas Hot 

 Springs, August (Barber and Schwarz). Beulah (H. Skinner). Coolidge 

 (H. F. Wickham). 



Utah: Panguitch, July 2, 1907 (H. E. Burke). Alton, July 13, 1922; Bryce 

 Canyon, August 5, 1922 (G. Hofer). 



Also recorded in the literature from other localities in the above 

 States. It has been recorded from California by different collectors, 

 but the writer has not examined any specimens from that State, and 

 the California record for the lectotype and paratype in the Academy 

 of Natural Sciences of Philadelphia, given by Chamberlin (1926), is 

 an error for "Col." The specimens from Kansas and South Dakota 

 listed by Chamberlin (1926) as being in the United States National 

 Museum could not be located. Fletcher (1907) records the species 

 from Aweme, Ontario. 



Hosts. — This species has been reared from pifion (Pinus edulis 

 Engelmann) collected by J. L. Webb in the Santa Catalina Moun- 

 tains, Ariz., and the adults have been collected on limber pine (Pinus 

 flexilis James), blue spruce (Picea pungens Engelmann), and Douglas 

 fir (Pseudotsuga taxifolia (LaMarck) Britton). Chamberlin (1926) 

 records Kocky Mountain white oak (Quercus utahensis (De Candolle) 

 Rydberg) as one of the hosts, but this may be an error, as this species 

 seems to be restricted to coniferous trees. Burke (1918) records it as 

 mining the bark and sapwood of dying and dead limbs, logs, and 

 stumps of western yellow pine (Pinus ponderosa Lawson). 



The color and sculpture on the dorsal surface of the body are 

 rather constant. The clypeus is arcuately or angularly emarginate 

 in front, and sometimes the pronotum is widest near the apex, with 

 the sides obliquely converging posteriorly. The dilation on the an- 

 terior tibia of the male is slightly variable in size and shape, and the 

 emargination at the apex of the last visible abdominal sternite of 

 the female is wider in some specimens than in others. The length 

 is from 9 to 15 mm. 



