CHROMOSOMES IN THE SPERMATOGENESIS OF THE HEMIPTERA HETEROPTERA. 173 



Figs. 275-287, Calocoris roiiidus. 

 Fig. 275, spemiatogonic monaster (v. 1901/), Fig. 177). 

 Fig. 276, spermatocyte nucleus, synapsis. 

 Fig. 277, idem, end of growtli period. 

 Fig. 278, late propliase, first maturation division. 



Figs. 279, 280, pole views, first maturation spindle (with 279 v. 1901//, Fig. 185). 

 Figs. 281-283, first maturation spindles (with 281 v. inol/y, Fig. 182). 

 Fig. 284, second maturation spindle. 

 Figs. 285, 286, pole views of second maturation spindles. 

 Fig. 287, second maturation anapha.se. 



Figs. 288-294, Pa-cihcapsus goiiiplionai. 

 Fig. 288, spermatocyte nucleus, rest stage. 



Fig. 289, pole view, first maturation spindle (v. 1901/;, Fig. 19()). 

 Fig. 290, first maturation spindle. 



Fig. 291, pole view, second maturation spindle (v. 1901/i, Fig. 197). 

 Fig. 293, second maturation spindle. 

 Figs. 293, 294, corresponding daughter plates, early anaphase of second maturation division. 



Figs. 295-299, Lygus pmfoisiK. 

 Figs. 295, 296, pole and lateral views, first maturation spindle. 

 Figs. 297, 298, pole and lateral views, second maturation division. 

 Figs. 299, anaphase of second maturation division. 



