xii, D, 3 Seale: The Mosquito Fish 187 



Tower, Winthrop Vose. A study of mosquitoes in San Juan, Porto Rico. 

 Circular Porto Rico Agr. Exp. Sta. (1912), No. 14. 



This paper gives a list of the mosquitoes of Porto Rico, their breeding 

 places, the methods followed in mosquito work, and the ordinances recom- 

 mended with the view of ridding the city of the pest. Ordinance D was as 

 follows (p. 19) : "All water in fountains shall be treated with oil or with 

 mosquito feeding fish." Regarding the destruction of mosquitoes by natural 

 enemies this paper states (p. 7) : "A number of fish have been under 

 observation, being kept in a large tank. They are very fond of mosquito 

 larvae and have been seen eating the egg masses of the common house 

 mosquito of the Tropics. The presence of these fish in streams may account 

 for the scarcity of the malarial bearing mosquitoes and therefore the small 

 amount of malaria on the island." 



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