PLATE VI. 



Fig. 1. Eggs of Salda authracina in bog moss. 



Fig. 2. Photograph of egg of Hydrometra mari'.nl. 



Fig. 3. Eggs of Lamprocanthia c'rassico>7iis at the base of shove 

 grass. 



Fig. 4. Microphotograph of the egg of Hydrometra attached to a 

 sprout of cattail. Two sprouted seeds of cattail are shown. Note the 

 superficial resemblance. 



Fig. 5. Gerris eggs laid in nature on the underside of grass blade 

 floating out upon the water. On the upper grass blade the eggs have 

 hatched. Note the longitudinal rent. 



Fig. 6. Eggs of Gerris marginatiis on upper surface of leaf blade in 

 an aquarium containing very little water. 



(278) 



