10 Till; CANADIAN ENTOMOLOGIST. 



very glossy. The second joint of the maxillary palpi is very long, the 

 relation of first to second being as 2 to 19. 



E. perplexus, var. Hu^isonicus, Cress., 1863. 



Prof. Cockerell records this variety from Cusack Rch, Custer Co., 

 Colo., August 3. The type locality is '' Hudson Bay Terr.," not 

 " Hudson " as given by Dalla Torre. 



B. Nevadensis, Cress., 1874. 



B. improbus, Cress.', 1878, o* • 



9 9 )une, July 12, 24, August 6, 18, at Ft. Collins ; 9 <$ July 31, 

 August 1, Beaver Creek ; July 3. Little Beaver Creek ; May 23, Boulder; 

 May 26. Bellvue; August 5, Antonito (Ball); 9 July 24, Virginia Dale; 

 ct July 8, Livermore. 



There is now little question that B. improbus is the male of this 

 species. The type of the male was taken in " Colorado " by Morrison ; 

 of the female the types were from Nevada. Arizona and New Mexico. 



B. fervidus, Fabr., 1798. 



" Apathus elatus " ,T , in part. 



9 May 12, 30, June 7, 8, ir, 16, 19; ? May 14, 20, 25, June 15. 

 Julv 20, 31, August 8. 19, 20; o* September 3, 16, all at Ft. Collins. 

 9 ? August 14, July 8 ; 9 July 15, at Livermore ; 9 August 5, Antonito; 

 July 13, Trinidad ; August 17, Montrose (Gillette); July, Ft. Lupton (R. 

 Haynes). 2 J September 4, Boulder. A very common species. 

 B. boreal is, Kby., 1837. 



This species was recorded by Prof. Cjckerell from Old Beddoe's 

 Rch. Custer Co.. August 9, on Rudbeckia laciniata. I have not been 

 able to satisfactorily separate this species from any material I have seen. 

 B. appo situs, Cress., 1878. 



9 August, Ft. Collins (C. Stannard) ; August 5, Cameron Pass ; 

 August 9. Gunnison ; August 23, Leadville ; September 23, Vir. Dale; 

 June 15, Bellvue; July 15, Livermore. 9 2 August 30, Store Prairie 

 (/.oco ft.). <$ Palmer Lake, August 12, 1896 (Gillette). This species 

 can readily be recognized by the white pubescence of the anterior part of 

 the thorax ; visible even in specimens on the wing. It has been taken 

 on Thermopsis montanum and Rudbeckia, sp. 

 B. dubius, Cress., 1863. 



This is recorded by Prof. Cockerell from Custer Co.; a female in the 

 collection at Ft. Collins, doubtfully labelled B. Edwardsii, may belong 

 here. I took the specimen at Westlake (8,000 ft.), July 7, 1900, 



