ILLUSTRATIONS. 



Page. 



Fig. 1. Adults of Culex and Anopheles. 8 



2. Anopheles maculipennis 9 



3. Anopheles crucians ^ 10 



4. Eggs of Anopheles 11 



5. Eggs and larva of Culex 12 



6. Full-grown larva of Culex 13 



7. Full-grown larva of Anopheles 14 



8. Pupa of Culex and Anopheles 15 



9. Common house fly ( Musca domestica) 15 



10. Drosophila ampelophila 15 



11. Cat and dog flea 16 



12. Cattle tick 16 



13. Tsetse fly '. 16 



14. Black gadfly 17 



15. Bedbug 17 



16. Stegomyia fasciata 18 



4 



