BY W, R. COLLEDGE. 59 



INDEX TO PLATES. 



Fig. 1. — Eggs of Anopheles, showing thin membrane on upper surface. 



2. — Larva. 



.3. — Two segments of larva, showing epaulettes. 



4. — Single epaulette enlarged. 



5. — Pupa arising from larval form. 



6.— Perfect pupa. 



7. — Tracheal spiracle from head of pupa. 



8. — Insect escaping from pupa skin. 



',). — Natural attitude of Anopheles on wall. 

 10. — Natural attitude of Culex or common mosquito. 

 11. — Edge of wing showing fringing scales. 

 12. — Wing showing markings on nervures. 



13. — Female head showing palpi, nearly equal in length to proboscis. 

 14. — Male head with plumose antennae and club-like palpi. 

 1-5. — Lancets and barred palpi of female. 

 16. — Proboscis of culex, showing base of maxillary lancets projecting 



backwards. 

 17. — Prothoracic spiracle with tracheal tubes attached. 

 18. — Air sac of male Anopheles, showing air vesicles. 

 19. — Lancets and pump or reservoir. 

 20.— Cup on base of lancet, with terminal tube from veneno salivary 



glands. 

 21. — Stomach with Malpighian tubes, egg sacs at side, and one renal 



capsule at base. 

 22. — Male Anopheles segment with claspers and tick attached to last 



segment. 

 23. — Male Anopheles Pictus. 

 24. — Female Anopheles Pictus. 



