THE CHROMOSO!\fES IN DIABROTICA 



N. M. Stf.vens 



PLATE I 





-X 





L^ 



m^^m ^ 





X-1 



10 



11 



/^h 





12 



13 



17 



X- 



18 







X 



22 





r»A-ii 



14 



•Jfm 



r-X 



19 



00" 



00 



23 



&t 



/ .A-n 



15 



21 



26 



27 



20 



16 



-X 



- -X 



24 



25 



n >n s «<^ 



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



