THE CHROMOSOMES IN DIABROTICA 



N. M. Stevens 



28 



4-v- -X 



1^1^ iHi 



#^-^--s 



PLATE II 



-X 



#r\-t-s 



- - X 



30 



'■^ iP ^ iS 



29 





31 



X 



S4. 





-s 



32 33 



•7/ 



^f ^ 



38 



34 



35 



36 



^^t '£i 4* 



---s 



39 



37 



40 



42 



44 



The Journal of Experimental Zoology, vol. v, no. 4 



