Plate VI 



Phlepsius irrotatus {Family Jassida) 

 Fig. i86 Spermatogonia! equatorial plate, 15 chromosomes. 

 Fig. 187 First spermatocyte, rest stage. 



Fig. 1 88a and b First spermatocyte, equatorial plate, and the odd chromosome .v. 

 Fig. 189 First spermatocyte, metaphase. 

 Fig. 190 First spermatocyte anaphase. 



Figs. 191, 192 Second spermatocytes, equatorial plates, containing 8 and 7 chromosomes, respect- 

 ively. 



Fig. 193 Second spermatocyte, metaphase. 



Fig. 194 Second spermatocyte, anaphase. 



Figs. 195, 196 Spermatids, half without .v, half with. 



Agallia sanguinolenta {Family Jassidte) 

 Fig. 197 First spermatocyte, spireme stage. 

 Fig. 198 First spermatocyte, equatorial plate, 11 chromosomes. 

 Fig. 199 First spermatocyte, metaphase. 



Figs. 200, 201 Second spermatocytes, equatorial plates, containing 1 1 and 10 chromosomes, respect- 

 ively. 



Fig. 202 Second spermatocyte, early anaphase. 



Figs. 203, 204 Spermatids, half without x, half with. 



Fig. 205 First spermatocyte, equatorial plate, aceto-carmine preparation. 



Fig. 206 First spermatocyte, anaphase, aceto-carmine preparation. 



Fig. 207 Second spermatocyte, equatorial plate, aceto-carmine preparation. 



Clastoptera tbtusa {Family Cercopid<t) 

 Fig. 208 Spermatogonia! rest stage. 

 Fig. 209 Spermatogonia! prophase. 



Fig. 210 Spermatogonia! equatorial plate, 15 chromosomes. 

 Fig. 211 Spermatogonia! metaphase. 

 Fig. 212 Spermatogonia! anaphase. 

 Figs. 213, 214 First spermatocyte, early synapsis. 

 Fig. 215 First spermatocyte, contraction stage. 

 Fig. 216 First spermatocyte, postsynapsis stage. 

 Fig. 217 First spermatocyte, spireme stage. 

 Fig. 218 First spermatocyte, early prophase, tetrad formation. 

 Fig. 219 First spermatocyte, prophase, dumb-bell formation. 

 Fig. 220 First spermatocyte, equatorial plate, 8 chromosomes. 

 Fig. 221 First spermatocyte, metaphase. 

 Fig. 222 First spermatocyte, anaphase. 



Figs. 223, 224 Second spermatocytes, equatorial plates containing 8 and 7 chromosomes, respect- 

 ively. 



Fig. 225 Second spermatocyte, metaphase. 



