FIG. 
PLATE XV. 
GERRIS AND TREPOBATES. 
1. Hatched egg of Gerris marginatus, showing the postnatal 
molt and the black chitinous “egg burster.” 
Fig. 
Fi. 
FIG. 
FIG. 
FI. 
Fic. 
FIG 
FIG. 
FIG. 
FIG. 
weed. 
ee 
FIG 
eyes. 
F1a. 
2. First instar nymph of G. marginatus. 
Nymphal molt of Gerris. 
Front foot of Gerris 
First instar nymph of G. remigis. 
Ventral view of male Gerris. 
Dorsal view of male Gerris. 
Ventral view of female Gerris. 
CO AAD TR ge 
. Dorsal view of female Gerris. 
10. Mating Gerris. 
11. Eggs of Trepobates pictus on under surface of floating duck- 
(Lemna.) 
12. First instar nymph Trepobates pictus. 
13. Egg ready to hatch. Note the “egg burster” between the 
The small spots are red as well as the eyes. 
14. Eggs of Trepobates pictus on underside of leaf blade. Note 
the gelatinous matrix. If disturbed the entire mass comes from the leaf 
intact. 
(296) 
