PLATE 12 



EXPLANATION OF FIGtTRES 



100 T. parvipennis pennata. Oogonium, 14 chromosomes. 



101 to 127 Tettigidea parvipennis Morse. 



101 to 103 Cells from the ovarian follicle. Fourteen chromosomes; two no. 

 5.r's in each cell. Chromosomes show their split. 



104, 105, and 107 Spermatogonial cells all from same animal but from dif- 

 ferent cysts of testis; 13 chromosomes. One no. 4 (4 — ) is deficient in length. 

 Chromosomes show their split. 



106 5's and 6's from various cells, similar to those of figure 104, showing the 

 knobs on the ends of the chromosomes. 



108 to 110 From dividing cells in the 'fat body' surrounding the testis of 

 same animal from which figures 105 to 107 came. A deficient no. 4 chromosome 

 (4—) present in each case. 



108a and b are the parts of one cell from two sections. 



110 is in anaphase. 



302 



