( Ixsxviii ) 



specimen which emei-ged in 1907, and the 15 which emerged 

 in the summer of 1908, showing any approach towards the form 

 hryonise, and these are much nearer to na2n than to hnjonise. 

 Some of the insects which emerged in the summer of 1907 

 were paired inter se, the progeny of which all emerged in the 

 spring of 1908, being all oiapi, 9 males and 19 females. 



Some of the first generation which emerged in the spring of 

 1908 were also paired inter se, but so far only 5 specimens 

 have been bred and they are all typical napi, 2 males and 3 

 females ; some pupse of this generation ai-e lying over the 

 winter, presumably to emerge in the spring. 



An attempt to obtain the reciprocal pairing, viz. English 

 napi male with hryonise female, was a failure in 1907 ; but in 

 the spring of 1908 we succeeded in pairing a British napi 

 male (Scotch) with hryonix bred from parent taken on the 

 Simplon Pass, in 1907, by Mr. Rowland-Brown. From this 

 pairing we obtained 18 males and 17 females and a few pupse 

 which are lying over the winter. The females are rather 

 remarkable, they are more like bryo7iice than 7iapi, but the 

 black markings are a deeper black and are more extended 

 than in Bryonia, and the contrast between these markings and 

 the ground colour is greater. 



Our experiments were undertaken to see if Mendelian 

 proportions would be obtained, but from this point of view 

 the results are quite negative. So far it would appear that 

 the hryonise characters are not transmitted by the male, but 

 are transmitted in an exaggerated degree by the female. We 

 hope to have an oppoi-tunity of repeating our experiments, as 

 the practical disappearance of hryonise characters when cross- 

 ing a male with British napi is so unexpected that it needs 

 confirmation. 



Life History of Polygonia c-album, imago. — Mr. L. W. 

 Newman read the following note on the life history of the 

 imago of Polygonia c-album, and exhibited many examples to 

 illustrate his remarks. 



"During the past season I have had ample opportunity 

 of studying the life history of this butterfly, having bred over 

 2,000 from the ova ; we all know the habits of the species, it 

 hybernates as an imago, pairs in the spring, and then lays its 



