320 E. J. ALLEN AND E. W. SEXTON. 
Matings :—(5) with female VI.A.2.f. (B+ A); (30 young, 
12 Black, 18 Albino). 
VI.A.3.bb. Female, Albino carrying Black and Red. 
Matings :—(1) with male I.H.2.a. (R+A); 12 young, 
3 Black, 2 Red, 7 Albino ; 
(2) with male b of the same brood (B+ A) ; 
(14 young, 2 Black, 12 Albino). 
VI.C.1.q. Male, Albino carrying Red only. 
Mating :—(1) with female I.H.2.d. (Red); 13 young, 
all Red. 
VI.C.2.p. Male, Albino carrying Red only. 
Matings :—(1) with female VI.B.2.1. (R+A); 6 young, 
3 Red, 3 Albino. 
Five of these young came to maturity, Red, one male and one 
female, and Albino, two males and one female ; these were mated 
together to see if the Albinos carried the Black factor ; 203 young 
were produced, 116 Red, and 87 Albino; no Black appeared. (One 
of the Albino males was mated with female VI.C.3..) 
VI.C.2.q. Male, Albino carrying Black and Red. 
Matings :—(1) with female VI.B.2.f. (R+ A); 20 young, 
6 Black, 5 Red, 9 Albino. 
VI.C.2.7. Male, Albino carrying Black and Red. 
Matings :—(1) with female I.G.1.c. (A); 49 young, all 
Albino ; 
(2) with female VI.A.3.x. (Pure Red); (34 
young, 22 Black, 12 Red). 
VI.C.2.s. Male, Albino carrying Black and Red. 
Matings :—(1) with female VI.B.2.m. (R+<A); 9 young, 
3 Black, 2 Red, 4 Albino. 
VI.C.2.t. Male, Albino carrying Black and Red. 
Matings :—(1) with two Red females which it ate ; 
(2) with female I.E.2.e. (Pure Red); 27 
young, 15 Black, 12 Red. 
VI.C.2.u. Male, Albino carrying Red only. 
Matings : —(1) with Red female which it ate ; 
(2) with female k of the same _ brood, 
(B+R-+A); (21 young, 17 Black, 1 Red, 
3 Albino) ; 
(3) with female VI.B.2.]. (R+A); 1 young, 
Albino ; 
