70 



Circular No. 15. 



B 



FIG. 4. Heads of yellow fever mosquito (Aedes calopus). A, female; 

 B, male. Original. 



Fia. 5. 



Heads of malaria mosquito (Anopheles punctipennis) 

 A, female; B, male. Original. 



threatening demonstration is made by its prey. It appears to 

 cease biting when complete darkness comes on. 



The common brown mosquito (Culex quinquefasciatus) 

 also breeds in buckets and barrels, but is not so closely restricted 



