Ill 



of control and an outline of future plans are given. The spring 

 broods of salt-marsh mosquitos for 1919 caused very little trouble 

 in the protected area. 



The mosquitos observed during the 5'ear included Aedes {Ochlero- 

 tatus) sollicitans, A. (0.) cantator, A. sylvestris, Culex pipiens and 

 Anopheles crucians. The latter has not previously been reported so 

 far north in New Jersey. 



Beckwith (C. S.). Drainage Plans for Dismal Swamp for the 

 Purpose of Eliminating Serious Mosquito Breeding. — Rept. New 

 Jersey Agric. Expt. Sta., 1919-20, New Brunswick, N.J., 1921, 

 pp. 514-516. [Received 9th March 1922.] 



The survey here described was undertaken to determine if mosquito 

 breeding in this area could be eliminated at a reasonable cost. It was 

 ascertained that the important species of mosquito breeding in it is 

 the fresh- water swamp mosquito [Aedes sylvestris], which has been 

 proved to have an extreme migratory range of ten miles under con- 

 ditions of exceptional abimdance. Studies have also shown that 

 unless the breeding is very concentrated and the number of mosquitos 

 emerging very large, long migrations do not take place. They ako 

 indicate that this species tends to move from the breeding-place 

 toward the nearest centre of population. The drainage plans with 

 their estimated cost are recorded. 



Order under the Tick (Control and Eradication) Law, 1920 (Law 41 of 



1920).— Jamaica, 10th December 1921, 1 p. 



By an enactment dated 10th December 1921 under the above order 

 [R.A.E., B, ix, 47], owners of holdings on which there are cattle to 

 the number of 100, are required to construct dipping tanks sufficient 

 for the effective dipping of all cattle before the 1st May 1922. The 

 construction of these tanks shall be subject to the approval of the 

 Director of Agriculture, and any alterations that he may require are 

 to be effected within three months of the service of such notice. 



Dammerman (K. W.). Nieuwere Onderzoekingen over Malaria- 

 MusMeten in Nederlandsch-Indie. [Recent Researches on Malaria 

 Mosquitos in the Dutch East Indies.] — Teysmannia, Batavia, 

 xxxii, no. 1, 1921, pp. 1^-30. [Received 11th March 1922.] 



This article summarises the work done on Dutch East Indian 

 Anophelines of late years and contains no new information. 



Gedoelst (L.). Le Trimorphisme larvaire des OestriiBi^s. — C.R. Soc. 

 Biol., Paris, Ixxxvi, no. 9, 4th March 1922, pp. 501-504. 



The various larval stages of Hypoderma hovis and H. lineatum, as 

 described by Laake [R.A.E., A, ix, 171], and of Gastrophilus pecorum, 

 as described by Boas, are reviewed. As a result of recent observations 

 these flies are thought to have only the usual three larval stages, and 

 that there is nothing in the above-mentioned authors' observations to 

 prove the existence of more. 



