THE CANADIAN ENTOMOLOGIST. 



New South Wales districts of British Columbia," and defines the latter in 

 the list of localities given in his catalogue as " comprising, Avith the excep- 

 tion of Alaska, all that part of North American north of latitude 49°." 



If Mr. Strecker will consult a good atlas he will find that the name 

 British Columbia is confined to the territory lying west of the main range 

 of the Rocky Mountains, and of a straight line running from 55° N., 120° 

 W. due north, and south of latitude 60° N. The remainder of this vast 

 region, exclusive of Manitoba, being known as the North-West Territory 

 of Canada. 



I have never heard of the names " New North Wales " and " New 

 South Wales " having ever been given to any part of British North 

 America. 



Apologizing for this geographical digression, I would return to a 

 cohsideration of Mr. Strecker's reasons for considering these species 

 identical. 



He says that he has both yellow and orange males and yellow and 

 white females of Christina, and that though expanding about a half inch 

 more than Pelidne he can find no difference sufiicient to separate them, 

 and so regards them as the same species, with a tendency to orange color 

 and great size on the western districts. Why 'a butterfly traveUing west- 

 ward should become changed from yellow to orange and increase in alar 

 expanse by one third or more is not stated ; he simply concludes that it 

 does. However, from Mr. Edwards' remarks, referred to above, it is evi- 

 dent that Mr. Strecker has confounded two or three different species. 

 Four of my specimens were sent to Mr. Henry Edwards for examination, 

 and of them he wrote : " I confess I cannot separate No. i (a male speci- 

 men) from C. Keewaydin of the Pacific States ; the females, however, seem 

 different and the species may be good." 



The characters which appear to me to separate this species from all 

 forms of Eicrytheme are as follows : 



In Eurytheme and its varieties the female, so far as I know, have a 

 distinct border on secondaries. 



The females of Christina do not have this border. 



In Eurytheme the sub-marginal spots below are generally distinct. 



In Christina they are nearly always wanting, only two specimens, ^ 

 and $ , out of fifteen showing traces of them. 



In Eurytheme there is a brownish patch on the costa of secondaries 

 below. 



