DAVIS: SPERMATOGENESIS. 



77 



G. Steiroxys trilineata. 



This is the only locustid that I have studied. As one would expect, 

 it difPers quite markedly from the Acrididae. Possibly the most strik- 

 ing difterence is due to the fact that the cells are much smaller and 

 richer in chromatin. In the later generations of the spermatogonia 

 the amount of cytoplasm is very small, so that the cysts appear at 

 first glance to be made up almost entirely of deeply staining nuclei. 



As in the Acrididae, there is always an apical cell (Plate I, Fig. 4) 





K. L. 



Figs. / and /. Polar views, metaphase of spermatogonia in Stenoboihrus curti- 



pennis showing autosome pairs. X 1450. 

 Fig. K. Polar view, metaphase of epithelial cell from vas deferens of Steiroxys 



trilineata. X 1450. 

 Fig. L. Polar view, metaphase of spermatogonium of Steiroxys trilineata. X 



1450. 



at the distal end of each follicle. The nucleus stains only faintly^with 

 iron hematoxylin, the network being made up largely of achromatic 

 material, in which are imbedded scattered chromatic granules. The 

 granular material surrounding the nucleus stains only faintly with 

 Bordeaux. 



Both the primary and secondary spermatogonia in the resting stage 



