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 larvae of Culex 12 



6. Full-grown larva of Culex 13 



7. Full-grown larva of Anopheles 14 



8. Pupte of Culex and Anopheles 15 



9. Common house fly {Musca domestica) 15 



10. Drosophila ampelophila 16 



11. Cat and dog flea 17 



12. Cattle tick 17 



13. Tsetse fly 18 



14. Blackgadfly 18 



15. Bedbug 18 



16. Stegomyia calopus 19 



155 



