I2O Appendix. 



about 40 pupae only 4 emerged, 3 of which were Prorsa 

 and I Porima. The remaining pupae hibernated and 

 all changed into Levana the following spring. 



B. Kept in a room heated to 6 15 R. from 

 November. Not a single specimen emerged the same 

 year. This lot of pupae were added to C from No- 

 vember. 



C. Placed on ice for a month immediately after pu- 

 pation ; then, from September 28th to October igth in 

 the hothouse, where no more butterflies emerged. The 

 pupae hibernated, together with those from lot B, in a 

 room heated by water to 6 15 R., and gave : 



On the 6th of February, i female Levana. 



22nd I male Levana. 



23rd i male Levana. 



24th i female Levana. 



25th i male and i female Levana. 



28th i male and i female Levana. 



1st of March, I male Levana. 



1 3th i female Levana. 



1 5th i female Levana. 



i Qth i male Levana. 



2nd of April, 2 male and i female Levana. 



7th i female Levana. 



2 1st i female Levana. 



2nd of May i female Levana. 



Total . . 1 8 Levana, TO of which were 



females. 



The exact record of the time of emergence is interest- 

 ing, because it is thereby rendered apparent that different 

 individuals respond more in different degrees to a higher 

 than to the ordinary temperature. Whilst with many 

 an acceleration of development of I 2 months occurred, 

 others emerged in April and May, i. e. at the time, of 

 their appearance in the natural state. 



