284 HE. J. ALLEN AND EE. °oW. SEXTON. 
V.A. Male, Black carrying Albino. Red not known. 
Matings :-(1) with female D of the same brood, (B+A 
only, probably); 17 young, 12 Black, 
5 Albino. 
V.B. Male, Black carrying Albino. Red not known. 
Matings : (1) with female E of the same brood, (B+A 
only, probably); 8 young, 6 Black, 2 
Albino. 
V.C. Male, Black. Constitution unknown. 
V.D. Female, Black carrying Albino only (probably). 
Matings :-(1) with a male of the same brood ; 5 young, 
4 Black, 1 Albino ; 
(2) with male A of the same brood; (17 
young, 12 Black, 5 Albino). 
V.E. Female, Black carrying Albino only (probably). 
Matings :--(1) with a Black male of the same brood ; 
3 young, all Albino ; 
(2) with male B of the same brood ; (8 young, 
6 Black, 2 Albino). 
1. Female, Black. Constitution unknown. 
.G. Female, 
.H. Female, 
J 
Ss, 
F.1. GENERATION. Reps. 
Of the 15 Red, 4 males and 6 females reached maturity. (Plate I.) 
Mated in the same brood they all gave some albino offspring, showing 
that they contained the factor c. 
The following list shows the matings made to prove their constitutions: — 
II.B. Male, Red carrying Albino (Plate II). 
Matings :—(1) with female VI.B; (R+ <A); 101 young, 
76 Red, 25 Albino ; 
(2) with female 14.a. from the original stock 
of all-white male R.1. (see p. 324) ; 
29 young, all Red (one of these was 
mated with female VI.C.3.s.) ; 
(3) with female 14.b. from same brood as 
14.a.; 30 young, all Red (see p. 324) ; 
(4) with female VI.A.2.k.; (A+B+R); (146 
young, 33 Black, 44 Red, 69 Albino) ; 
(5) with female VI.A.1-p. ; (R+ A); 90 young, 
66 Red, 24 Albino (Plate IV, Fig. 12). 
