In order to examine the effect of the interaction of cherry and white in the same individual (i. e., white-cherry compound) cherry females were crossed to white males. This cross should give white-cherry females and cherry males. These white-cherry females were found (table 30) to be very much lighter than their brothers, the cherry males. The color of the pure cherry females and males is the same, but the substitution of one white for one cherry lowers the eye-color of the female below that of the cherry male. In eosin the white also lowers the eye-color of the compound female about in the same proportion as in the case of cherry. In the eosin the female starts at a higher degree of pigmentation than the male and dilution seems to bring her down
to the level of the male. But this coincidence of color between eosin male and white-eosin compound female is probably without significance, as shown by the results with cherry.
Table 30.—P1 cherry ♀♀ × white ♂♂.
| Reference. | First generation. | |
| White-cherry compound ♀. | Cherry ♂. | |
| 9 M | 321 | 302 |
Eosin-cherry compound was also made. An eosin female was mated to a cherry male. The eosin-cherry daughters were darker than their eosin brothers. Inbred they gave the results shown in table 31.
Table 31.—P1 eosin ♀ × cherry ♂.
| First generation. | Second generation. | ||||||
| Reference. | Eosin-cherry compound ♀♀. | Eosin ♂♂. | Reference. | Eosin and eosin-cherry compound ♀♀. | Cherry ♂. | Eosin ♂. | |
| 43C | 71 | 58 | 1I | 154 | 99 | 62 | |
| 2I | 174 | 74 | 77 | ||||
| 328 | 173 | 139 | |||||
Although in the F2 results there are two genotypic classes of females, namely, pure eosin and eosin-cherry compound, the eye-colors are so nearly the same that they can not be separated. The two classes of males can be readily distinguished; of these, one class, cherry, has the same color as the females, while the other class, eosin, is much lighter. Such an F2 group will perpetuate itself, giving one type of female (of three possible genotypic compositions, but somatically practically homogeneous) and two types of males, only one of which is like the females.
FUSED.
In a cross between purple-eyed[[6]] males and black females there appeared in F2 (Nov. 4, 1912) a male having the veins of the wing arranged as shown in text-figure D b. It will be seen that the third and the fourth longitudinal veins are fused from the base to and beyond the