LIST OF ILLUSTRATIONS. 



FIG. I'AGE 



1. hzxYo. oi FiiiexfeHs{canis)- - - - - 22 



2. Fupa. of I^. irrUans - - - - - 23 



3. Imago of /'///t'.v $ ----- 24 



4. Head of larva of -P. /^//V (r^«/V) - - - - 26 



5. Alimentary canal of larva - - - - - 28 



6. Catocha latipes - - - - - ■ 39 



7. Balancer of Cecid - - - - - - 40 



8. $ Genitalia of a Cecid - - - - - 4' 



9. Larva and pupa of Cecidomyia - - - - 45 



10. Anchor process of Hessian Fly and Wheat Midge - - 46 



11. Aristolochia clematis^ showing method of fertilization - 49 



12. Galls produced by some Cecidomyidce - - - 71 



13. Mouth parts of yJ/y(r^//^ larva - - - - 95 



14. ha-Yvse oi Sa'opM/a, Cerop/a f us, and Sa'ara - - 96 



15. 'Pu^di oi Sciara - - - - - - 97 



16. Alimentary canal of Mycetid larva (J/i'irt'/d?//^//^) - - 100 



17. Head and antenna oi Asindulum, and head of Sciara - 100 



18. Boletina dubia - - - ■ - - ici 



19. Three types of venation in ^■(r/Vrra - - - - 107 



20. \Ying of Bradj'si'a - - - - - - n^ 



2 1 . Epidapus venaiicus - - - - -113 



22. \Wing of Zygofit'ura - - - - - - 1x4 



23. Mycetophila cingiilum - - - - - 116 



24. (^ Genitalia of /%;-6>///<:7 - - - - - 126 



25. ? Genitalia of /y/r^/z/Vz - - - - - 128 



26. 'Re^xd oi Leptonio?phiis Walkeri - - - ■ ^ZZ 



27. Head of Tetragoneura Sylvatica - - - - 136 



28. Sciophila Fascia fa - - - - - - i39 



29. Ceroplattis lineatus- - - - - - 143 



30. Antenna of a yl/<:7(r;-(?^era $ - - - - 144 



