April, '06] entomological news. 137 



and Colorado. But semicircularis from British Columbia have 

 the abdomen either uniformly colored or spotted. Of semicir- 

 cularis I have studied : Maine, 2 $ ; mountains of Southwest- 

 ern Colorado, 1 1 $ and 4 $ loaned me by Dr. Calvert ; Lang- 

 ford Lake, British Columbia, 2 $ , R. C. Osburn, collector ; 

 Glacier, British Columbia, 4 $ , R. C. Osburn, collector ; 

 Port Renfrew, British Columbia, 1 % , R. C. Osburn, collector. 

 Characters of 13 males of this material were tabulated. The 

 abdomen varies from 34-39 mm. in length, averaging between 

 38 and 39 for all the material excepting the Colorado speci- 

 mens, which are 34. Forcipata measures 37 and 38. In length 

 of hind wing all specimens of semicircularis are very uniform, 

 varying from 29-32, the majority being 31, which is the exact 

 measurement for this part in both forcipata. The color of 

 the costa will not separate the two species. Postcubitals in 

 the front wings vary from 5 (in a single wing) to 8 (in 2 

 wings). The usual number is 6 or 7 in both species. The 

 yellow spots on frons in front are variable in size, regardless 

 of locality. The lateral thoracic stripes are variable in extent 

 (at least in dried material), and will not serve to separate 

 species or localities. Forcipata (both specimens) and semicir- 

 cularis from Maine have the anterior femora brown beneath ; 

 all the other specimens of semicircularis, so far as I could de- 

 termine, have the anterior femora black beneath. One semi- 

 circularis from Maine has the upper lip with two clear brown 

 spots. All other specimens of both species have this lip black. 

 Nasus in forcipata (one specimen) and semicircularis from 

 Maine is dull brown ; in all western specimens of semicircula- 

 ris and in septentrionalis , the nasus is metallic, like the frons, 

 and the semicircularis from Colorado have the labrum almost 

 or quite metallic. So, as stated, I can find no characters 

 other than those of the appendages for separating forcipata 

 and semicircularis. These characters, both of superior and 

 inferior appendages, seem good so far as specimens before me 

 go, but it is possible that more extensive material might ren- 

 der these inadequate for the separation of the two species as at 

 present understood. 



Septentrionalis, apart from its basal wing markings, is sepa- 



