236 FRANK A. HARTMAN. 



PLATE III. 



FIGS. 56 to 63 inclusive. Polar views of the first spermatocyte metaphase, 

 -showing the variation in size of corresponding chromosomes of the same animal. 



Figs. 56 and 57 are from one animal, Figs. 58 and 59 are from one animal, Figs. 

 60, 6 1, 62 and 63 are from one animal. 



FIGS. 48 to 55 inclusive. Polar views of the second spermatocyte metaphase. 

 Figs. 48, 50, 53 and 55 are from young nymphs, 48, 50 and 55 being from the 

 same animal. Figs. 49, 51, 52 and 54 are from adults, all but Fig. 52 being from 

 the same animal. 



The chromosomes and cells of the adults are larger than those of nymphs as in 

 earlier stages. Corresponding chromosomes of the same animal also vary in size 

 at this stage as well as in the next stage (anaphase) represented by Figs. 64 to 67 

 from the same animal. 



