MOSQUITOES 61 



from the boat-shaped egg-masses of Culex pipiem. The 

 individual eggs differ greatly in shape from those of 



FIG. 24. Anopheles quadrimaculatus. (X 7.) 



Culex. The eggs of Anopheles are strongly convex below 

 and slightly concave above. As seen from the side they 

 are canoe-shaped. 



