26 THE CANADIAN ENTOMOLOGIST. 



there are four.* In the case of Apatura Celtis. at Coalburgh, the species 

 being two-brooded, there are five moults in the winter brood, four in the 

 summer. In A. Clyton, which liere has but one annual brood, there are 

 five moults, the larvae hibernating. In A. Flora, belonging to same sub- 

 group with C/ytofj, as distinguished from Celiis, but a Florida species and 

 double-brooded, I cannot speak as to the number of winter broods, but 

 in the summer of i88o, I found four moults only. I received eggs from 

 Indian River in July, and raised nine larvae to imago. But in i88i, I 

 raised larvae in August, from eggs received from Indian River, and all 

 passed five moults. Mrs. Peart, who was feeding two of this lot of larvae, 

 and making drawings of each stage, wrote me 25th Aug. that both had 

 passed 5th moult, and I had discovered the same thing myself. 



In 1880, ist moult, 24th July. In 1881, ist moult, 3rd Aug. 



2nd " 28th " 4 days, 

 3rd " ist Aug. 3 " 

 4th " 5-6th " 4>^ " 

 Suspended 14th " 7^ " 



Suspended ist Sept., 7^ " 

 In 1880, from 3rd moult to suspension was 13 days; in 1881 

 was 20 days ; and the length of this last period would seem to 

 make an additional moult necessary, but why the stages were so 

 protracted in '81 and so short in '80, I cannot guess. The conditions 

 were similar so far as I know. In '80, I had 4 males, 6 females from 

 chrysalis, in ^81 both sexes, though I do not appear to have made a note 

 of the exact number of each. But as all the larvae in one year passed 4 

 moults, and all in the other 5, the difference was not sexual. 



6. The proportion of chrysalids of Papilio Ajax which go into pre- 

 mature hibernation does not always increase as the season advances. 



Mr. Scudder states this as a rule, in "Butterflies," p. 172. In 1872, 

 1 related my observations on AJax, and 1 say : "It will be noticed that a 

 large percentage of the chrysalids of nearly every brood pass the winter, 

 the proportion seeming to increase as the broods succeed each other" Now 



* I omitted to state in that paper, that Limenitis Disippus makes its case in the fall 

 either after second or third moult. Of 7 larva; in Oct., 1881, 5 went into their cases 

 after second moult, 2 after third. I have noticed the same thing in former years, but no 

 larva has passed more than two moults after hibernation. So that this species would 

 have both 4 and 5 moults in the winter generation. 



