PLATE IV. 



Fig. 1 . Larva of Dineura testaceipes. 



Fig. 2. Larva of Camponiscus luridiventris. 



Fig. 3. Mine of Phyllotoma nemorata. 



Fig. 4. Larva of Croesus varus. 



Fig. 5. Larva of Croesus septentrionalis. 



Fig. 6. Larva of Nematus, sp. (on birch). 6 a, en- 

 larged segment. 



Fig. 7. Larva of ? 



Fig. 8. Larva of Nematus conductus. 



Fig. 9. Larva of Nematus fattax. 



Fig. 10. Larva of Nematus cadderensis ; 10 a, segment 

 of abdomen. 



Fig. 11. Larva of Nematus dorsatus. 



Fig. 12. Larva of Poecilosoma luteolum. 



Fig. 13. Larva of Nematus palliatus. 



