Bui. 329, U. S. Dept. of Agricultur 



Plate III. 



Eggs and Larva of Simulium. 



Fig. 1.— Egg of Simulium venustum, freshly laid. (After Mecznicow.) Fig. 2. — Egg of Simu- 

 lium venustum, second to fourth day. (After Mecznicow.) Fig. 3. — Egg of Simulium n nus- 

 tum, fourth to sixth day, showing "banded appearance." (After Mecznicow.) Fig. 4. — 

 Same, dorsal view. (After Kolliker.) Fig. 5. — Egg of Simulium venustum, just before 

 batching, showing larva in a free condition within the shell. (Original.) Fig. 6. — Egg of 

 Simulium pictipes. (Original.) Fig. 7. — Larva of Simulium bracteatum, showing histoblasts 

 of pupal filaments, A, A. All greatly enlarged. (Original.) 



