20 MOSQUITOES 



work ;it the Cold Spiiiii;- H;ul)or Laboratory, on Long 

 Island, has stated that with a south breeze, especially 

 after a prolonged and ^enth; wind of live or incjre hours' 

 duration, mosquitoes become very troublesome and it is 

 the local supposition that they are carried from the south 

 shore of Lon<;- Island, fifteen miles away. This is, the 

 writer tinds, the g-eneral opinion at several points on the 

 north shore of Long Island, but observations which he 

 has made on the moscpiito topography of that portion of 

 the island have shown that there are usually many l)reed- 

 ing-places much nearer than the south shore, and usually 

 quite near the infested places, which will much more 

 easily account for the mos(piito sui)ply. In fact, careful 

 observations made by Mr. H. C. \\ eeks, of liayside, Long 

 Island, have shown that in the immediate vicinity of the 

 Cold Spring Harbor laboratories there are many breed- 

 ing-places of such extent and such capacity as to indicate 

 that the south shore theory nnist be abandoned. 



So many instances, in fact, have come to my attention, 

 where extensive l)reeding-places ])rofusely stocked with 

 mosquito larva' have been overlooked by the ])eoi)le of 

 given neighborhoods, that I have, as a general rule, be- 

 come more or less incredulous on the subject of extended 

 mosquito flights. Fermi and Lumbao, in their report on 

 operations in Sassari, state that the mosquitoes of the city 

 do not go far from their original breeding-grounds, since 

 they find sufficient food near the habitations of jieople 

 and animals. The reason which the Itali;in authors give 

 for this absence of migration may be correct or incorrect, 

 but their experience has shown that where a house loca- 



