112 MOSQUITOES 



Culex and ten times with lisli. Dr. F. A. Young-, a Brit- 

 ish army surgeon, has tokl me that in his experience if 

 the larvae of Culex and Anopheles are put into the same 

 vessel those of Anoj^heles will disappear. 



Lieutenant-Colonel Yerbury says that " the natural 

 home of Anopheles seems to be damp swampy ground, 

 but not necessarily so wet as a marsh or a fen." Grassi 

 and Ficalbi state that A. iiiaculipenids is most frequently 

 found in flat land in Italy, the larvae requiring clear Avater 

 rich in vegetable food. E. E. Austen found in Freetown 

 that Anopheles larvae were in stagnant puddles, varying 

 from a foot to several feet, at the sides of the streets, but 

 many were met in the still water in little bays at the side 

 of slowly running shallow ditches. Whether the water 

 was clear or muddy seemed to make no difference, but 

 green algae were nearly always present and in some pud- 

 dles tadpoles were numerous. Dr. H. A. Yeazie, of New 

 Orleans, has found Anopheles larvae in the x^onds out in 

 the suburbs in the SAvamps back of the city. Dr. Wol- 

 dert, of Philadelphia, has found the larA^ae of both A. ma- 

 cullpcnnU 'A'n^ A. punctlpemds breeding in the same nar- 

 roAv and sloAvly floAving stream of fresh Avater, Avhicli 

 drained a marshy district formed by a railroad embank- 

 ment. He found larvae in this stream from June 19th to 

 November 11th and located five localities Avithin the city 

 limits of Philadelphia Avliere Anopheles breeds. Grassi, 

 at Metaponto, Italy, is said to have found Anopheles in 

 brackish water. 



