IOO 



MEXDELISM 



CHAP. 



sives with regard to the sexes was peculiar. The original 

 cross was between a lacticolor female and a normal male. 

 All the Fi moths of both sexes were of the normal grossu- 

 lariata type. The Fi insects were then paired together 





















■ r *Ci 









p 5^- >B 







m • «^ 





!^H|H] 





9 *a 



jr <*JJJ 



jtf fjff 



Br 'An 



Hk ^Kwll * _l3rH 





iHr ^& 





* JS^W 



35f*- * 



£l«» m&& 



IW *4m! 



AK-' 







BB^ ^ 



■» 4m~ r : 





39^ v 







* : * ffl 





' -•< * 



fc » .<m 



wLa • ** fl 



K% 



* 



fcL^^dMll 



^^^_*> 



>2B ;£* 









Fig. 17. 



Abraxas grossidariata , the common currant moth, and (on the right) its paler lacticolor 



variety. 



and gave a generation consisting of 3 normals : 1 lacti- 

 color. But all the lacticolor were females, and all the 

 males were of the normal pattern. It was, however, 

 found possible to obtain the lacticolor male by mating a 



Lacticclor X Grossulariata 



9 1 6 



Lact.C? X Gr.9 X Gv.S X Lact. 9 



1 1 1 1 1 1 



Gr.C? Lact.9 Gr.C? Gr.d Gr.9 Lact.9 Gr.cS Lact.C? Gr.9 Lact.9 



lacticolor female with the Fj male. The family resulting 

 from this cross consisted of normal males and normal 

 females, lacticolor males and lacticolor females, and the 



