1917] Hungerford—Life-History of Mesovelia mulsanti White 83 
EXPLANATION OF PLATE. 
Fig. 1. Mesovelia mulsanti, winged male with membrane of 
wings broken off. 
Fig. 2. Mesovelia mulsanti, winged female, wings entire. 
Fig. 3. Fifth instar nymph; note the dorsal pore on fourth 
abdominal segment. 
Fig. 4. First instar nymph. 
Fig. 5. Eggs in stem of sedge, surface view of the two at left. 
The other two seen in situ in stem when portion of stem is removed. 
Fig. 6. Fourth instar apterous form. 
Fig. 7. Two eggs, showing their connection with surface of 
stem; eye spot shows in the one to the right. 
Fig. 8. The embryonic membrane, cast by the hatching nymph; 
2 “pegs”? shown at the left enlarged. 
Fig. 9. Apterous male. 
Fig. 10. Apterous female. 
Fig. 11. Male genitalia from above. 
Fig. 12. Male genitalia from side, hooks in black. 
Fig. 13. Ventral view of female ovipositor in its sheath. 
Fig. 14. Ovipositor, lateral shafts shaded. They slide up and 
down on the central shaft. 
Fig. 15. Cephalic view of ovipositor, turned into position for 
action. 
Drawings 1, 2, 4, 9, and 10, by Miss Ellen Edmonson. 
BIBLIOGRAPHY. 
(1) Bueno, J. R. de la Torre. Hemiptera Heteroptera of West- 
chester County, N. Y. Jr. N. Y. Ento. Soc. 1908. 
(2) Butler, E. A. On the Habits of Mesovelia furcata. Ent. 
Mag., X XIX, pp. 232-236. 1893. 
(3) Champion, G. C. Mesovelia mulsanti in; Biologia Centrali- 
Americana, Hemiptera Heteroptera, II. 1898. 
(4) Kirkaldy, G. W. List of the genera of the Pagiopodous He- 
miptera Heteroptera, with their Type Species, from 1758— 
1904. (And also of the aquatic or semi-aquatic Trochalo- 
poda.) Trans. Am. Ent. Soc., 32, p. 117. 1906. 
(5) Kirkaldy, G. W. and J. R. de la Torre Bueno. A Catalogue of 
American aquatic and semi-aquatic Hempitera. Proc. Ent. 
Soc., Washington, Vol. X, p. 173. 1908. 
