298 Journal New York Entomological Society. t Vo1 - xxvn. 



THE BEES OF PEACEFUL VALLEY, COLORADO. 



By T. D. A. Cockerell, 

 Boulder, Colo. 



During the last week of August, 1918, having no holiday this sum- 

 mer, my wife and I ventured to retire for four days to Peaceful Valley, 

 in the mountains of Boulder County. It is a deep valley running east 

 and west, with steep wooded sides, the altitude at the bottom about 

 8,000 feet above sea level. The biota is characteristically boreal, the 

 plants including such genera as Linncca, Pyrola, Achillea, Anten- 

 naria, Dasytephana, Vaccinium, Arnica, Veronica, etc. It is above 

 the zone of sun-flowers, but a solitary Helianthus lenticularis, of 

 small stature, had developed from some accidentally dropped seed, 

 and was blooming cheerfully. Weeds are not very abundant, but 

 there is a large patch of Gccrtneria tomentosa (Nutt.) Heller. The 

 principal bee-flowers were found to be Phacclia hctcrophylla Pursh 

 and Heliomeris multiflora Nuttall ; they are cited below by the generic 

 names only. At one spot, patches of Phacelia, Heliomeris and Mo- 

 narda grew close together, and it was interesting to note that their 

 bee-visitors were almost all different. Galls of Rhodites tubercidator 

 Ckll. were found on the roses. The common butterflies included 

 Basilarchia wcidemeycri Edw., Euvanessa antiopa L., Pieris rapec 

 L., Eurymus alexandra Edw., etc. Few moths were caught ; the most 

 interesting were Autographa angulidcns Smith and Crambidia casta 

 Sanborn. The coccid Orthczia occidentalis Dougl. was common; it 

 seems to be specially attached to Fragaria. Among wasps the curious 

 Crabro latipes Smith was taken. The bee-fauna proved unusually 

 interesting, including the following species : 



Prosopis gaigei Ckll. 2 2, at Phacelia (W. P. Cockerell). New 

 to Colorado. 



Prosopis elliptica Kirby. 1 5, Aug. 27. 



Andrena apacheorum Ckll. 1 5, Aug. 25. 



Halictus cressonii Rob. Both sexes ; all at flowers of Heliomeris, 

 except one female from Phacelia. 



Halictus ruidosensis Ckll. Both sexes. Male at Phacclia (W. 

 P. C). 



