THE CANADIAN ENTOMOLOGIST. 233 



temperature was found to be 32\ On 19th May, exposed one chrysalis 

 (A) at 5 hours from pupation, and one (B) at 14 hours. These were left 

 for 18 days, being taken off the ice 7th June. On 14th June emerged 



1 ^ , " $ , both suffused on under side of hind wings, and in same man- 

 ner. The male came from the chrysalis B, exposed at 14 hours, and is 

 very melanic on whole upper surface, the fulvous areas being restricted to 

 narrow bands. In the female (A) exposed at 5 hours, the fulvous area is 

 not different from that of some examples not exposed to cold. Both 

 these, on under side, have the buff spots of discal band in the costal and 

 subcostal interspaces lengthened so as to connect and become confluent 

 with the buff marginal spots. In the male the two wings are not equally 

 affected, the left wing having three of these spots confluent, the other only 

 one completely, and one nearly. Another male (C) exposed at 18 hours 

 old, and for 9 days, is melanized on upper side, but to a less extent than 

 the male (A). On the under side of hind wing the buff spots are largely 

 reduced in size, and often obliterated ; of the 5 spots next base, 3 are 

 represented only by black (that is, the buff has passed away), and the other 



2 are reduced to less than half the usual size ; the discal band is reduced 

 to small, disconnected spots. In the normal examples this band is cut by 

 two black lines running across the wing, leaving the middle section broad, 

 and the two outer sections made up of small spots. There is a little 

 irregularity in the course of these black lines, but the result is that on the 

 4 interspaces next costal margin there are 3 buff spots to each, 2 each to 

 the next two interspaces, and 3 on the last interspace (or sub-median). In 

 the example under view the whole of the anterior row of buff spots is 

 wanting. In the normal example there is also a complete sub-marginal 

 row of pretty large buff lunules ; in this other all are wanting except two 

 narrow crescents in the median interspaces and a streak in the discoidal 

 interspace. 



A 5]^ (D) exposed at 24 hours, and for 9 days, is not changed on upper 

 side, but on under hind wing the buff discal band is nearly obliterated, the 

 whole of the inside (and longest) spots being lost. The spots about base 

 are not changed, nor are the submarginal crescents. Another $ (E) 

 exposed at 24 hours and for 9 days, is not changed on upper side, but on 

 under hind wing the submarginal crescents are lost, excepting in the two 

 median interspaces, and there they are reduced to narrow bars ; all the 

 buff of both wings is changed to yellow. 



On 13th June, I placed to chrysalids on ice, at 6 to 24 hours old ; on 



