THE CANADIAN ENTOMOLOGIST. 41 



B. scutellaris, Cress., 1863. 



o» July 22, August 25, Ft. Collins; August 4, Julesburg (Ball). 

 The pubescence is bright and showy, while on />. Edwardsti, its nearest 

 relation, it is more irregular and paler. 

 B. Edwardsti, Cress., 1878. 



9 (2) June 12, Ft. Collins ; June 15, Bellvue ; Rist Canon, July t ; 

 Westlake, July 7 ; August 3, Barnes' Camp (S,ooo ft.). 

 B. Putnami, Cress., 1878. 



% June 12, Ft. Collins ; August 1, Lizard Head (Bali) ; <$ August 

 30, Ward (7); August 17, Home (Ball). All these localities are high 

 Alpine, 7,000 to io ; ooo ft., Ft. Collins excepted. This species was 

 described from one male collected by J. Duncan Putnam, probably at 

 Empire City, a high Alpine species. Closely related to Couperii and 

 Edwardsii. More abundant material is needed to base satisfactory 

 determinations. 

 B. proximus, Cress., 1S63. 



9 April 23, Horsetooth Gulch ; July 21, Rist Canon; September 

 3, Vir. Dale. ° 9 May 15, Ft. Collins ; July 7, Westlake ; August 18, 

 Home (Ball); August 24, Vir. Dale; J 9 V August 22, Cimmaron ; 

 August 23, Marshall Pass (Gillette). 

 B. proximus, var. Coloradensis, var. nov. 



9. — Black; face with yellow and black hairs; thorax banded with 

 black; anteriorly yellow; scutellum with some black hairs mixed with 

 yellow, especially along the sides ; thorax beneath brownish-black ; first 

 two abdom'nal segments with black pubescence, third with fulvous 

 yellow, — a few black hairs intermixed on basal margin ; fourth to sixth 

 with white hair, a high-power lens shows a few black hairs on the 

 middle of fourth segment basally ; a few pale hairs at extreme apical 

 margin of second ; posterior tibiae and femora fringed with pale brown 

 hairs, basal joint of posterior tarsi within very bright rufous, last four 

 joints of all tarsi brownish ; some pale hairs on fourth and fifth ventral 

 segments; clypeus shiny, punctured; wings fuscous, tip of marginal cell 

 very dark. Length, 20 mm. 



Described from one specimen collected by me in Rist Canon (6,500 

 ft.), May 8, 1897. Easily separated from proxi//ius or Howardii by the 

 position and colour of abdominal pubescence. 

 B. Howardii, Cress., 1863. 



9 August 1, Beaver Ck. (10-12,000 ft.); August 23, Marshall 



