George Lefevre and Caroline McGill 481 
Fie. 1. Anasa tristis. <A-F, spermatogonial groups; G, H, anaphases of 
second division, showing division of m-chromosomes in @ and the undivided 
heterotropic chromosome on both spindles; I, J, anaphase groups from the 
same spindle, polar view, second division, showing m-chromosome and macro- 
chromosome in each and the heterotropic (h) in J. 
