R. K. Naboues 



39 



461 



Expect. 



I 

 HS 



2 



3-: 



HSHese X SS 



ss use sse 



4 



5 

 3-7 



~\ 



4 N 

 3-7 



463 



Expect. 



I — 

 1 

 BJ 



42 

 31-7 



~v 



BP 

 48 

 31-7 



JP x BCBQCQ 



T~T^"T~T^T""1 



cj cp BJe BP0 cje cpe 



29 27 28 28 2.5 27 147 292 

 31-7 31-7 31-7 



31 



31- 



31- 



, PS X BBS 



r-T^-T-1 



BP Bs ijpe Bse 



464 7 9 5 146 231 



Expect. 6-7 6-7 6-7 &7 



413 



In a- few matings separations of BB@ from BSB<h}, BC& from fi©C'0, 

 and 000 from C'@C'@ were made in the records. As has already been 

 indicated, this is a very tedious and difBcult undertaking, as the dif- 

 ference between an individual homozygous for 6 and one heterozygous 

 for it is only slight at best. If the determinations are not made within 

 a few days after moulting it is necessary to group them, as was done in 

 most of the matings. Mating (341) (BS@ x jS.S'0) was separated with 

 special care, the result being shown in the table. The following 

 matings, grouped in the table, were thus separated, but the mortality 



