144 Mosquitoes 



supported by the entanglement with it of the 

 breathing tube and of the palmate tufts on their 

 backs. 



A. maciilipeunis is found all along the eastern coast, 

 more abundantly northward, being found from Flor- 

 ida to Canada. A. punctipennis seems to have a gen- 

 eral range throughout the country. A. crucians, 

 while found in New York State, is most abundant 

 in the South, being plentiful along the southern 

 Mississippi. 



Stegomyia calopus. — Convicted by a competent 

 jury of scientists, upon the testimony of trained ex- 

 perts, of transmitting that most dread disease, yellow 

 fever; suspected of further mischief of a kindred 

 nature, and, by common consent, admitted to be 

 the most pestiferous member of the whole family of 

 Culicidse, in the South at least, an effort to rob 

 S. calopus of the only decent characteristic with 

 which it is popularly credited would seem to be 

 a matter of persecution. The larvae, however, 

 are frequently found in company with the typically 

 foul water C. fatigans, in sewage polluted water. 

 The larval stage of their existence is much shortened 

 in the germ-laden fluid. In a saturated solution of 

 fecal matter, this portion of its life cycle is but four 

 days, as against a minimum of six in any other 

 media with which Dr. Dupree experimented, the 

 imagos from batches in this solution coming out in 

 six days, while all in gutter water died in two days, 

 and those placed in Mississippi River water survived 

 but six days. These experiments were made in 

 August and September. 



