A'A. chb. v^ac. 



Fig. 04. — Diagram of spermatogenesis in the hemiptera (after Bowen (3, 

 and 7) ). For details of lettering see Fig. 63. In addition : As.v.^ acrosomal 

 vesicle ; As.gr., acrosomal granule ; Nk., Nebenkern ; Nk.chL, central 

 (ilnomophilic mass of Nebenkern ; Nk.chb., cortical chromophobic mass of 

 Nebenkern ; Nk.chb.vac, vacuoles in chromophobic cortex of Nebenkern. 



[To face p. 141. 



