Studies on Chromosomes 



FIGURE 4 



Euschistus, Mineus. a, E. variolarius, second spermatocyte-division; b, sister-groups, second 

 division; c, d, corresponding views of E. servus; e, second spermatocyte-division, E. tristigmus; /, g, 

 E. variolarius, spermatogonial and oogonial groups respectively; h, i, corresponding views of E. servus; 

 j, k, the same, E. ictericus; /, m, the same, E. tristigmus; n, o, the same, E. fissilis; p, Mineus bioculatus, 

 second spermatocyte-division; q, sister-groups, from the same spindle, second division. 



