Studies on Chromosomes 



/Ik 



w 



w 



14 



f . 



o" C 



If I I 

 It M M 



d <? e 



I t M 



FIGURE 5 



Lygaeus, Coenus, Podisus, Nezara. a, Lygaeus turcicus, second spermatocyte-division; b, sister- 

 groups, second division; c, d, spermatogonial groups; e, the chromosomes of d arranged in pairs; 

 /, oSgonial group; g, the same in pairs; h, i, Coenus delius, spermatogonial and follicle-cell groups; 

 /, m, Nezara hilaris, spermatogonial and oogonial groups respectively. 



