Genie Control of Development 293 



DESc/ 



PESO 



MESC. 



PFWC- 



•GESC 



PHWC 



,DSFC 



osci-/ Vffc 



V deg 



Deckscale 



-^5 Long follicle 



/ V 



ESC 



< 



Epithel 



MSCl-( 



^MSFC- 



Mscn-/ 



^FFC 



Middle scale 

 -^^ Long follicle 



ESC -/ 



\_ deg s 53 Short follicle 



-c 



^Gscn- 



• GSCl/ 



v. deg . 



^GSFC 

 "^ FFC 



Epithel 



Ground scale 

 Short follicle 



ESC 



-CZ3 



-CZ3 



Epithel 



SSCI 



ESC 



-c=a 



-c=:i 



Epithel 



Fig. 17. Diagram of differentiation of wing scales in Ephestia. Ploidy is in- 

 dicated by dichotomic lines in scales. Arrangement of following legend corre- 

 sponds to vertical columns. (From Henke, 1952.) 



