1911] Heredity in Adalia 291 



From the foregoing results the following conclusions seem 

 to be quite evident: 



I. Melanopleura is dominant over annectans, coloradensis, and humeralis, 



and the heredity is segregate. 

 1. Over annectans since 



a. The hybrid form between melanopleura and annectans is 



melanopleura. Of the progeny, 30 in number, of a cage of 

 melanopleura, annectans constituted over half. In the 

 progeny of two females and one male tested by mating 

 with humeralis there appeared 76 annectans and 69 

 melanopleura, altogether, which is very close to the 

 Mendelian ratio for the segregation of characters in 

 hybrids. 



b. Annectans has in no case given evidence of carrying melano- 



pleura characters. The 25 progeny from a cage of 

 annectans showed no melanopleura characters nor did any 

 of the 57 progeny of the annectans female mated with 

 humeralis. 



2. Over coloradensis since the hybrid form between melanopleura 



and coloradensis is melanopleura as is shown by the fact that 

 :; coloradensis appeared among the offspring of melanopleura 

 parents, 



3. Over humeralis since 



a. The hybrid form between melanopleura and humeralis is 



melanopleura. In "the first generation from three crosses 

 of melanopleura with humeralis or with annectans-kumeralis 

 hybrids, humeralis appeared but once among 159 individ- 

 uals. A melanoplcura-lntmcralis female mated with its 

 brothers gave 9 melanopleura. 1 annectans, and .'! humeralis. 

 The same female mated with a humeralis male gave 6 

 melanopleura and 8 humeralis, approximately showing 

 the segregation of characters to be according to the 

 Mendelian law. The second generation from crossings of 

 melanopleura with humeralis consisted of 19 melanopleura 

 and 7 humeralis. 



b. Humeralis has given no evidence of carrying melanopleura 



characters. The 30 offspring from humeralis parents all 

 came true to type. 

 II. Annectans is dominant over humeralis since 



a. The hybrid form between annectans and humeralis is 



annectans. In the cross between annectans and humeralis 

 humeralis did not appear at all in the first generation of 

 57 progeny, but did appear in half of the second gen- 

 eration which consisted of 4 beetles. A nnectans-humeralis 

 hybrids mated with each other produced 7 annectans and 

 in humeralis in one case, and in another 12 annectans and 

 5 humeralis. 



b. Humeralis has given no evidence of carrying annectans 



characters, as shown by the 30 offspring of humeralis 

 parents all true to type. 



