164 N. J. Agricultural Experiment Station, Bulletin 348 



growing, would seem to justify an examination of the data beanni,^ 

 upon mosquito migration in the hope of finding out how to minimize 

 its effects. 



Extent 



Howard, Dyar and Knab^ have brought together a mass of data 

 bearing on the question of mosquito migration. As might be ex- 

 pected, there is much evidence of flight without any indication of 

 the species concerned, but there is also much where the species 

 has been determined. Table i will serve to give the facts. 



Table i 



Data on Mosquito Migration 



Date I Investigator 



Place 



Species 



1879 



1884 

 1886 



1903 

 1904 



1904 

 1908- 

 1910 

 1909 



Mitchell 



Hetherington 

 Mitchell 



Russell 



Smith . 



Carter 



Mayer 

 Young 



Matagorda Bay 



Ship "Gedney" . 

 Matagorda Bay 



5hip "Newark" 



New Jersey seacoast 



and bay coast 



Gulf of Mexico off 



Loviisiana coast . . . 



Dry Tortugas 



Ship "Concho" 



Unknown, probably 

 salt-marsh 



Unknown 



Unknown, probably 

 salt-marsh 



An. annulipalpis . . 



A. sollicitans, A. can- 

 tator 



Salt-marsh 



A. niger, Salt-marsh 

 Unknown 



No. of 

 Miles 



50-60 



27 



50-60 



30-40 



15-18 

 60 

 60 



It thus appears that the far-flying species are those which 

 breed on the salt marshes, that 25 or 30-mile movements are com- 

 mon, and that extremes of 60 miles may be reached. 



The writer has traced the salt-marsh species A. cantaior and A. 

 sollicitans during each of the last seven summer seasons and has 

 found them penetrating the back country for long distances. Twen- 

 ty-five-mile migrations are common, and 35 to 40-mile migrations 

 take place when the brood emerging is very large. A. caniator has 

 not been observed to cover the distances reached by A. sollicitans, but 

 the difference may be due to the cooler weather and the smaller 

 broods of the former. 



"Hownrd I. O, Dyar, H. G., and Kiiab, Frederick. 1912. The Mosquitoes 

 of North and Central America and the. West Indies, v. i, p. 330-245. 



