PLATE 25 



EXPLANATION OF FIGURES 



190 Spermatogonium of Chortaphaga viridifasciata, one of the Oedipodinae, 

 after Davis ('08). Same number of pairs of autosomes. Sex chromosome ranked 

 8x. 



191 Spermatogonium of Dissosteira Carolina, one of the Oedipodinae, after 

 Davis ('08). Eleven pairs of autosomes plus one se.x chromosome (9.r). 



192 Spermatogonium of Melanoplus femoratus, one of the Acridiinae, after 

 Davis ('08). Eleven pairs of atuosomes plus sex chromosome (lOx). 



In figures 148, 159 to 162, 184 to 192, note that all subfamilies have three ex- 

 tremely small chromosomes or pairs, and three extremely large ones with a some- 

 what similarly graded series between. 



193 to 202 from Locustidae. 



193 Spermatogonium of Steiroxys -trilineata after Davis ('08). Thirty-one 

 rod-shaped chromosomes. 



194 to 201 After Woolsey ('15). 



194 Spermatogonia! chromosome group from Jamaicana subguttata Walker. 

 Thirty-five rod-shaped chromosomes, paired. Sex chromosome is 18x. 



195 First maturation division of same species, showing seventeen first sper- 

 matocyte pairs of autosomes in the process of reduction. Sex chromosome (18.r) 

 going over undivided to one pole. 



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328 



