136 MOSQUITOES 



from the Isle of Pines (Mr. S. H. Scudder), from Kiiig-- 

 ston, Jamaica (Mr. C. W. Johnson), from Cuba (Drs. Heed, 

 Carroll, andLazear), and from Blnelields, Nicaragua {Di-. 

 L. A. Wailes). Nearly all these places are well within 

 the yellow-fever belt. Yirginia Beach, the northernmost 

 locality indicated, is only a short distance from Norfolk, 

 Va., which in former years has suffered from yellow-fever 

 epidemics. It must be said that the collections of mos- 

 quitoes which have been made are more or less accidental 

 and that no thoroui^h means have been taken to ascertain 

 the exact g-eographic range of this or any other species 

 of mosquito. It is quite likely that thorough collecting 

 would show the existence of this species at a more north- 

 ern locality. In fact, if it should prove to be the only 

 species of mosquito which is capable of transferring this 

 fever, the epidemics of yellow fever in Philadelphia and 

 New York, and even in New Haven and Providence, about 

 the beg'inning' of the last century, would indicate that at 

 that time, at least, this mosquito had a more northern 

 range, or at all events that it had been introduced at those 

 points by sailing vessels coming from the South, and that 

 it succeeded in breeding there at least for some part of a 

 year. 



The insect itself is a very handsome one. The banded 

 legs and the conspicuous silver stripes upon its thorax and 

 abdomen render it rather readily recognizable. It is well 

 shown in the accompanying illustrations. It l)reeds almost 

 everywhere in standing water. So far as has been ascer- 

 tained, it does not breed in brackish water. Dr. Flanagan 

 sent me specimens in November, 1900, and wrote that the 



