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NEW YORK STATE MUSEUM 



land streams, or in the side pools or shallows of field springs or 

 artificial excavations filled with water. Small larvae are to be 

 found in such places, particularly where there is a certain amount 

 of green scum. Nuttall and Shipley state that in England these 

 larvae are to be found in pools, ditches, backwaters of rivers and 



Fig. 4 Characteristic feeding position of Anopheles larva 

 in upper figure, and that of Culex in lower figure. (After 

 Howard, U. S. Dep't Agric. Div. Ent. Bui. 25, n. s. 1900) 



canals and in other slow flowing waters, almost invariably in 

 such as are clear, and very rarely in impure or brackish water. 

 They state that the larvae frequent places not shaded by trees, 

 though Dr Howard has found them on several occasions in dense 

 shade. He adds that they are rarely found in water contained 

 in barrels, troughs and fountain basins. Our own experience has 

 been somewhat different, in that we have had no difficulty in 

 obtaining larvae of Anopheles in raiij water collected in an old 



