THE CANADIAN ENTOMOLOGIST. 173 



As to the females, there is not one of the June and July broods but 

 has a very broad margmal border to fore whigs ; and a broad one to hind 

 wings, more or less completely enclosing a series of spots of the color of the 

 yellow ground of wing. In Fh Hod ice, that sort of border to hind wing is 

 the exception, and there is great variation in its border, and in the length 

 of it, as well as the breadth ; while in Eurytheme form of the species that 

 sort of border is the usual. As to color, most of the females are lemon- 

 chrome, many very deep, others lighter, running into lemon-yellow. The 

 darker examples could not be matched in any series of Philodice. 



I have but five examples of the last fall brood of the butterfly, which 

 came from pupae 1-3 Oct. The two females that laid the eggs which pro- 

 duced these stand by them, and are lemon-chrome in color, with broad 

 borders to hind wings. All the five butterflies are small as compared 

 with those of the early broods ; the males have narrower borders, and 

 very large orange spots. The three females have a narrow border to hind 

 wing, extending from upper branch of sub-costal to second branch of 

 median ; the color is lemon-yellow, but the hind wings are very green, and 

 much dusted with fine gray scales, more so by far than any of the June 

 brood. In fact, there is the same sort of difference between these Octo- 

 ber examples and those of June and July as there is betv/een the orange 

 forms Ariadne and Eicrytheme ; that is, the form Hagejiii, so far as I can 

 judge by the examples under view, is itself seasonally dimorphic. 



On the imder side, the June and July butterflies, males, are all 

 chrome-yellow over both wings, and of a very uniform shade throughout 

 the series ; all have sub-marginal points or patches on both wings, a patch 

 at outer angle of hind wing. The uniformity is remarkakle on this sur- 

 face as compared with Philodice. Whereas the October butterflies are 

 pale colored, whitish-yellow, the hind wings densely dusted gray ; the 

 females still paler, still more heavily dusted ; and all have great discal 

 spots. So that the dimorphism is borne out by the under as well as the 

 upper side. Further observations are desirable on this fall brood, and I 

 hope this season to be able to make them. 



Colias Etirytheme, as well as Philodice, Alexa?idra, Meadii, Har- 

 fordii, hibernates in larval stage, but if the larvae are kept in a warm 

 room, they often will go on to pupation, reaching chrysalis even in mid- 

 winter. I suppose my larvas of September would naturally have hiber- 

 nated in Colorado, and in such case the butterflies from them would have 

 come from chrysalis in early spring. That would make the dimorphism 



