PLATE XIX. 
NOTONECTA NYMPHS. 
Fic. 1. Dorsal view of Notonecta variabilis first instar nymph. 
Fic. 2. Dorsal view of Notonecta irrorata first instar nymph. 
Fic. 3.- Dorsal view of Notonecta insulata first instar nymph. 
Fic. 4. Egg of N. insulata. 
Fic. 5. Hind femur of first instar nymph of Notonecta variabilis. 
Fig. 6. Egg of N. irrorata. 
Fic. 7. Hind femur of first instar nymph of Notonecta insulata. Com- 
pare with figure 5. 
Fig. 8. Egg of N. variabilis. 
Fic. 9. Middle femur (ventral view) of N. irrorata first instar nymph. 
Fig. 10. Egg of N. undulata. Figures 4, 6, 8 and 10 to same scale. 
Fic. 11. Middle femur (ventral view) of N. variabilis. Compare 
with figure 9. 
Fig. 12. Eggs of Buenoa margaritacea inserted in stem. 
Fic. 18. Hind leg of first instar nymph of N. variabilis. Note the 
banded leg. 
(304) 
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