APPENDIX I. 



EXPERIMENTS. 



EXPERIMENTS WITH ARASCHNIA LEVANA. 



i. BRED from eggs laid by a female of the winter form 

 on I2th 1 5th May, 1868, in a breeding-cage. The 

 caterpillars emerged on 2Oth 22nd May, and pupated 

 on 7th gth June. The pupae, kept at the ordinary 

 temperature, produced : 



On the 1 9th of June 4 butterflies. 

 20th 5 



2lSt 10 



22nd 9 



23rd 7 

 2 5th 13 



Total . . 48 



All these butterflies were of the Prorsa type, 3 females 

 having a considerable amount of yellow, but none with 

 so much as figs. 3, 4, 7, 8, or 9. PI. I. 



2. August 1 2th, 1868, found larvae of the third gene- 

 ration, which pupated at the beginning of September, 

 and were kept in a room not warmed. In September 

 three butterflies emerged in the Prorsa form, the re- 

 mainder hibernating and producing, after being placed 

 in a heated room at the end of February, from the 1st to 

 the 1 7th of March, 1869, more butterflies, all of the 

 Lev ana form. 



