DAVIS: SPERMATOGENESIS. 4 
G. Steiroxys trilineata. 
This is the only locustid that I have studied. As one would expect, 
it differs quite markedly from the Acrididae. Possibly the most strik- 
ing difference 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 1, Fig. 4) 
Fies. 7 and J. Polar views, metaphase of spermatogonia in Stenobothrus curti- 
pennis showing autosome pairs. xX 1450. 
Fic. K. Polar view, metaphase of epithelial cell from vas deferens of Steiroxys 
trilineata. X 1450. 
Fig. L. Polar view, metaphase of spermatogonium of Sieiroxys trilineata, xX 
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 
