104 



SEX INHERITANCE 



other hand, the difference between the eggs contained 

 in the male-producing and in the female-producing 

 migrants, and between the behavior of the chro- 



xxxx 



--r *-~-_rc 



XXXX 



MCRAVT- FEMALE PRODUCER 



XXXX 



MOUNT.- MALE PRODUCER 



XX XX 



XX XX 



FEMALE 



XX 



XX 



FIG. 36. Diagram to illustrate the chromosomal cvcle of Phylloxera 



fallax. 



