43 



of the innumerable small fish, l)ut were occasionally observed in small, 

 isolated pools on the mud, and were still more common in small pools 

 at the edges of swamps. It is a noteworth}^ fact that they did not 

 occur in swamp pools in such numbers as in the streams and rock 

 pools among- the hills of Sierra Leone. ''These rock pools would 

 appear to be the most suitable conditions for the breeding- of 

 Anopheles." 



The avidity with which Anopheles larvte under observation in 

 Washing-ton fed upon algie spores of the genera previously mentioned, 

 and the character of the breeding pools found here, indicate that with- 

 out doubt suuilar conditions will prevail generally in this country, and 

 Anopheles will always be found to breed most abundantly in fairly 

 permanent stagnant pools of water uninhabited by fish, but more or 

 less covered with green scum. 



OTHER SPECIES OF ANOPHELES. 



As appears from the synoptic table on previous pages, we havv^ in 

 the United States, so far as ascertained, three recognized species of 







Fig. 38. — Anopheles punctipennis: Female, with male antenna at 

 right, and wing tip showing venation at left — enlarged (original). 



this genus. A. quadrimaculatxis has just been figured in all its stages, 

 and the accompanying illustration (fig. 18) shows very well the beautiful 



