THE CANADIAN ENTOMOLOGIST. 109 



true eurytheme in considerable numbers here last June is a mys- 

 tery, as it is extremely unlikely that amongst the large numbers 

 of christina and eriphyle taken by Mr. Hudson and myself during 

 the previous seven seasons, we should never before have taken 

 anything resembling eurytheme had it occurred here annually. 

 Eriphyle, which is here a very much smaller and pale lemon- 

 yellow form, was flying at the same time, as well as christina, but 

 eurytheme was not observed when the second brood of eriphyle 

 appeared as usual in August. They agree well with eurytheme, 

 from S. Dakota, and specimens j t have been submitted to Dr. 

 Skinner for examination, so there is no doubt as to their identity. 

 Of about 20 specimens taken, all except two 9 $ show signs of 

 much flight, and I at first thought they might be migrants ; but 

 Mr. Hudson, their captor, tells me that they were on the wing 

 here for some time before he noticed that they were not christina. 

 Of seven or eight $ $> taken, three were albinos. 



Var. eriphyle, Edw. Very common ; end of May and June, and 

 again in August. I have taken fresh specimens in July. Also at 

 Lacornbe (Gregson) and Banff (Sanson). 



75. C. christina, Edw. Common ; June and July. Lacombe, August 

 (Gregson) and Banff, August (Sanson). The pale lemon-yellow 

 form of the o* is rather rare near Calgary, but is, I believe, more 

 common in the mountains. The 9 $ show most extraordinary 

 variation. It is hard to find two alike. I have a specimen, I 

 believe sexually a $ , having the right side normal, of the pale, 

 almost immaculate yellowish white variety, and on the left side 

 showing a tendency to become an orange £ , in having irregular 

 dashes of orange in several places on both wings, and patches of 

 distinctly £ brown marginal band near the apices. 



75a. [C. occiaentalis, Scud. Lacombe in August, fairly common (Gregson). 

 The name is on the authority of Dr. Strecker. Mr. Gregson 

 sent me three $ $ and one $ as occidentalis. The $ and one 

 o* I believe to be christina. The other two o* $ are certainly 

 very near christina, but differ in more than one respect from any 

 form of that species that I have taken near Calgary. Until I can 

 examine more material, this form must stand as doubtful.] 



