THE MALARIAL MOSQUITOES 115 



Columbia, Virginia, Georgia, Florida, and Louisiana. 

 The last species therefore seems to be a more southern 

 form, while the other two have a very wide distribution, 

 including- a considerable distribution to the North. 



Dr. W. N. Berkele}^, of New York, in the Medical Record 

 for January 26, 1901, states that A. j^^inct'qyennis is abun- 

 dant in certain parts of Bronx Boroug-h, particularly Je- 

 rome Park. A. inacidipennis api)ears to be universally dis- 

 tributed in the suburbs of New York. Since he learned 

 how and where to look for it, he found it nearly co-exten- 

 sive with all the cases of fresh malaria that he had the 

 leisure to g-o to and look into. It was present in such 

 widely separated places as Passaic, N. J., Tuxedo, New 

 York, Fordham, and Jerome Park, Mount Vernon, and 

 East Hampton. In East Hampton, on the authority of 

 Dr. F. P. RoUey, Dr. Berkeley says that until the summer 

 of 1900 no native malaria had been known at East Hamp- 

 ton, in spite of a larg-e number of malarial mosquitoes. He 

 explains this in two ways : (1) That no malarious case had 

 recently been imported there to start an infection among- 

 the mosquitoes, and (2) that the nights are cold, the 

 night temperature being considerably below the mini- 

 mum (77° F.) at which the malarial bodies are believed, 

 according to Koch, to develop in the stomach of the mos- 

 quito. The Anopheles Avas always found in buildings, 

 oftenest on walls and ceilings of reeentl}- used bedrooms, 

 and far most abundantly in the foul and ill-ventilated 

 bedrooms of the poor. The house females were usually 

 gorged with blood, and sluggish enough to be easily 

 caught. They were numerous in outdoor privies. He 



