THE CANADIAN ENTOMOLOGIST 297 



Petricola may stand for the form with orange- secondaries. Walk- 

 er's type happens to be paler than average mountain specimens. 

 The names of course should be reversed, thus: 



5. petricola Walk. — Ground color of primaries creamy 

 ochreous, secondaries orange. Alberta Rocky Mountains. 

 Rare on the prairie. 



Var. athahasca Neum. — Ground color of all wings whitish, 

 sometimes pure white. Alberta prairies. Rare in the moun- 

 tains. 



It usually flies on the prairies from the middle of June to the 

 middle of July. My mountain specimens are dated from June 

 30th to July 27th, but I don't know that I was ever in the moun- 

 tains before the earlier date. It flies most freely at low levels, 

 but my palest mountain specimen comes from 7,500 feet on Mt. 

 Saskatchewan, and was taken by Mrs. Nicholl. I have a fcm.ale 

 from Eureka, Utah, wdiich is probably petricola. Athabasca is well 

 figured by Holland on PI. XXX., f. 29. What his fig. 35 is I don't 

 know\ It may possibly be a worn specimen of this species, but 

 shows more reddish in the secondaries than any of mine. It cer- 

 tainly is not alleni. Grote's type of allenl in the British Museum 

 appeared to me to be adumbrata, as did also the alleni of the Henry 

 Edwards collection. 



An analogous case to this amongst Alberta butterflies is per- 

 haps found \n Argynnis electra, which is the predominating form in 

 the mountains where lais is rare; whereas lais is the normal prairie 

 form, where electra is seldom met with. 



424. 5. sp. — I had listed this as hudsonica, and it is the 

 hudsonica of the Kootenai List. I do not feel quite confident that 

 it is not a variation of that species (No. 422), but I have so far been 

 unable to connect them. I have never taken it on the prairie, nor 

 nearer to Calgary than Laggan, but have seen it on the wing in the 

 daytim.e in abundance all through the mountains during July, and 

 Dr. Dyar records it apparently as somewhat comm^on in the Koo- 

 tenai from May 29th to July 13th. So far as the males are con- 

 cerned, the maculation and color scheme is practically identical 

 with hudsonica, but the tone is very much darker, there being more 

 inoration with black scales, and all the black shades blacker. 



