1911] Heredity in Adalia 287 



From the cage of annectans only annectans were obtained. 

 Twenty-five adults were reared from eggs laid in this cage, and 

 fifty-seven from eggs laid by a female tested in a way to be 

 explained later, making eighty two beetles in all, and every one 

 proved to be annectans. The eggs of one annectans female 

 captured out of doors produced several melano pleura but this 

 female had probably been fertilized by a hybrid male or even by 

 both melanopleura and annectans males before it was captured. 



The humeral is beetles reared from the first pair mentioned 

 were used for breeding purposes and all the individuals reared 

 came true to type, about thirty beetles maturing. 



It was now indirectly evident that mixing was quite com- 

 mon between melanopleura and annectans and that it sometimes 

 occurred between annectans and humeralis, but there was no 

 evidence that it occurred between melanopleura and humeralis. 

 To ascertain whether this latter were possible and also to make 

 the actual crosses in the other cases in order to further investi- 

 gate the law of heredity, efforts were made to cross humeralis 

 as often as possible with annectans and melanopleura. Humer- 

 alis was found to hybridize just as freely with one form as with 

 the other. No more difficulty was encountered than would be 

 expected even among members of the same form under the 

 same circumstances. On one occasion an annectans male chose 

 a humeralis female even though a female of its own kind was 

 present in the cage. 



Unfortunately only one female of humeralis was available 

 for this purpose sufficiently early in the season, but there were 

 several males which proved capable and these were crossed 

 with females of both melanopleura and annectans. The female 

 of humeralis that was used was probably the one that produced 

 all of the above mentioned 30 humeralis, all true to type, she, 

 at any rate produced a large proportion of them. This beetle 

 was crossed with an annectans male but she died so soon that 

 only two beetles were reared from this union. They were 

 annectans but were too feeble for further breeding. An annec- 

 tans-humeralis hybrid female was mated with a melanopleura 

 male and later with an annectans male. This female had 

 previously been kept in a cage with its brothers and the eggs 

 laid had produced seven humeralis and four annectans, but 

 after these crossings no more humeralis appeared though 

 forty-seven beetles were reared. Three crosses were made by 

 means of the humeralis males and melanopleura and annectans 



