592 



FRESH-WATER BIOLOGY 



Fig. 886. Salpina spinigera Ehr. X 200. 

 (After Weber.) 



Fig. 888. Diplois daviesiae Fig. 889. Diplax mdens 

 Gosse. X87. (After Levander. X 267. (After 

 Weber.) Lucks.) 



Fig. 887. Diaschiza hoodii Gosse. 

 /I, Female. B.Male. X 300. 

 (After Dizon-Nuttall and Free- 

 man.) 



Fig. 890. Distylainermis Bryce. A, Dorsal view; 5, con- 

 tracted; C, side view. X 225. (After Dixon-NuttaU.) 



Fig. 89 1 . Distyla ohioensis Herrick . 

 X 420. (After Jennings.) 



