132 APPLIED BACTERIOLOGY FOR NURSES 



transmit yellow fever, Aedes calopus, are domestic pests. 

 They breed in and around dwellings, in rain barrels, 

 cisterns, in old tin cans and bottles, in stopped-up roof 

 drains, and the like. They do not breed in the fields, 

 woods, and swamps, which are the favorite haunts of the 

 malaria mosquito. 



Male. Female. 



Fig. 43. — Anopheles maculipennis (Howard). 



Adult female mosquitoes live a month or longer; males, 

 but a few days. Inasmuch as only the female mosquitoes 

 bite, it may be of interest to study the above pictures, 

 showing the differences between the male and female in- 

 sects (Fig. 43). 



YELLOW FEVER 



Although the specific organism of yellow fever has not 

 yet been identified, it may be well to mention the disease 

 here, because, like malaria, it requires a particular kind of 

 mosquito (Stegomyia calopus) for its transmission from 

 man to man. The disease is not conveyed by fomites. 



