102 



of A. qacdrimaculatus. Scliaudinn is quoted as stating that Anopbelinc 

 larvae are not found in water over 1 metre deep, but here and 

 elsewhere many were found in water over 6 feet deep. The influence 

 of this pool on the considerable amount of malaria in its neighbourhood 

 is not known. In the few residences examined in which ca^es of 

 fever had occurred, 50 A. quadrimaculatus and 2 A. lyunctipennis 

 were fomid. 



As always, it was found in these surveys that, having regard to the 

 production and proximity to sources of production, A. quadrimaculatus 

 were found in residences in much greater numbers than A. punctipennis, 

 while the difference was far less in sheds, unoccupied houses, etc. 

 Whether A. punctipennis is present or not in residences by night, is 

 a question which the authors hope to answer later. 



The ponds examined in South Carolina had constant levels and in 

 neither was wave action fully sufficient. The measures advised were 

 only carried out at one of them, the brush being cut on the banks 

 and the drift, etc., raked up from the water's edge and the side pools 

 being ditched and rendered accessible to fish. One creek provided 

 an instance of a particular aquatic growth being a serious problem, 

 HydrocJdoa carolinens's being the plant in question. It is not 

 common, but is of rapid growth, and if it were to spread, the problem 

 would be an insoluble one. Three species of mosquitos. including 

 A. quadrimaculatus, Uranotaenia sapphirinus and Culex sp., were 

 breeding profusely amongst it. 



Full-erown Anophehne larvae do not merely drift about on floating 

 objects!^but possess considerable powers of selection as to where they 

 travel in open water. 



While A. quadrimaculatus was found in the pond, larvae of this 

 species were not found near by in places where they might naturally 

 have been expected, and both here and in the Coosa pool, the pond 

 would appear to be a preferential breeding place for this species. 

 The same facts were observed as to the greater frequency of 

 A. quadrimaculatus in residences as compared with A. punctipennis, 

 as in the Alabama Survey. 



Headlee (T. H.). Report on Mosquito Work for 1915. — Rept. Entom. 

 Dept. New Jersey, Agric. Coll. Expt. Sta.for 1915, New Brunswick, 

 1916, pp. 339-364. [Received 22nd May 1917.] 



The salt-marsh mosquitos in the protected area were under better 

 control than in the previous year, being entirely absent from many areas 

 that were badly infested previously. As usual, Ochlerotatus (Aedes) can- 

 tator, Coq., appeared throughout the State as far north as Jersey City, 

 being replaced after midsummer in this area by 0. (A.) sollicitans, Wlk., 

 which later in the summer became a terrible pest in the territory 

 adjacent to the undrained marsh. All over the country the fresh- 

 water species were very numerous, the most troublesome being 

 Culex pipiens, L., and the fresh- water swamp mosquito, 0. (A.) syl- 

 vestris, Theo. 



A detailed account is given of the ditching and drainage operations 

 carried out in 1915, together with tabular and financial statements. 



