LIST OF ILLUSTRATIONS. 
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1. Larva of Pulex felis (canis) - : : dy" 8S 
2. Pupa of P. irritans - - - : - 23 
3. Imago of Pulex 2 - : : : - 24 
4. Head of larva of P. felis (canis) - : - 26 
5. Alimentary canal of larva - . - - - 28 
6. Catocha latipes - “ : . : ae 
7. Balancer of Cecid - - - - - - 40 
8. ¢ Genitalia ofa Cecid - - - - - 41 
g. Larva and pupa of Cecidomyia_ - - : 5 
ro. Anchor process of Hessian Fly and Wheat Midge - - 46 
11. Aristolochia clematis, showing method of fertilization - 49 
12. Galls produced by some Cecidomyide - - ee 
13. Mouth parts of AZycetid larva - - - + ye 
14. Larvee of Sciophila, acacia and Sciara - - 96 
15. Pupaof Sciara_ - - : - 97 
16. Alimentary canal: of Mycetid larva (Mycetophila) - - 100 
17. Head and antenna of Asindulum, and head of Sciara - 100 
18. Boletina dubia - - - . - =~ $6 
19. Three types of venation in Sciara - - - - 107 
20, Wing of Bradysia - . - - : FF 3 
| 21, Lpidapus venaticus - . - - - 113 
| 22. Wing of Zygoneura- - . : - - 84 
| 23. Mycetophila cingulum - - - - - 116 
24. & Genitalia of Phronia_ - - : - - 126 
: 25. 9 Genitalia of Phronia - - - - - 128 
: 26. Head of Leptomorphus Walkeri - : : - 133 
27. Head of Zetragoneura Sylvatica - : . - 136 
: 28. Sciophila Fasciata - - : - . - 139 
29. Ceroplatus lineatus- - - - : - 143 
. Antenna of a AWacrocera ? : - . - 144 
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