8o2 connecticut experiment station report, i907-i908. 



The Beaver Swamp Region. 



Beaver Swamp, near New Haven, has long been regarded as 

 unsanitaiy and as a source of malaria, even before the cause of 

 malaria and its methods of transmission were known. In the 

 mosquito survey made by this station in 1904,* this swamp was 

 found to be the most prolific source of Anopheles, or malarial 

 mosquitoes, about New Haven. The Board of Park Commis- 

 sioners has been working for some time to have the city purchase 

 this land on the grounds of sanitation, with the expectation that 

 ultimately it may be used for park purposes. Thus a small area 

 has been purchased each year for several years, until now nearly 

 all of the land between Munson Street on the south and Willis 

 Street on the north, extending from Fournier Street on the west 

 to the proposed extension of Sherman Avenue on the east, is 

 owned and controlled by the city. 



In 1904 the results of our examination were made known to 

 the Park Commission and to the health officer, and after another 

 examination in 1908 the facts were commtmicated to the mayor, 

 but so far nothing has been done by the city authorities to put 

 this area in a sanitary condition. 



The accompanying map (Figure 10), explained by the follow- 

 ing numbered notes, shows where the more serious breeding- 

 places are located: 



No. I. Small spring-like depression about three by five feet, 

 containing Culex larvae. 



No. 2. Tested edge of main stream for fifty feet or so. Found 

 a few Anopheles larvae and many Culex larvae. 



No. 3. A sedgy depression about ten feet long, containing 

 yellow pond lilies and breeding Culex larvae. In a wet season a 

 much larger area would be flooded. 



No. 4. Large boggy area more or less covered with water, 

 surrounding large pool with pond lilies growing in it. Found 

 Culex larvs in abundance. 



No. 5. A large deep pool in edge of stream, with Anopheles 

 larvae along the irregular edge. 



No. 6. A soggy area with more or less water covered with 

 lily pads, sedges, cattails and bushes. Found many Culex and a 

 few Anopheles larvae. 



* Report of this station for 1904, p. 293. 



