PLATE XII. 



FIGS. 25-28, 30-33. Caudal appendages of females of B. coloradensis in various 

 stages of absorption. < 25. 



FIGS. 29, 34-38. Diseased caudal appendages of females of B, coloradensis, 



X2 5 . 



FIG. 39. Branchial leg of the sixth pair of the male of B. Lindahli. X M- 



