Selection of breeding places by different species. 



The principle indeed extends to all the species of Indian 

 " anopheles," and an excellent example of its application to the 

 three species A. culicifacies (Giles), A. fuliginosus (Giles) and 

 A. rossi was found in an isolated bazaar at Mian Mir. This 

 bazaar is surrounded by an irrigation channel about four feet wide 

 and three feet deep. At the upper end of this water-course and 

 about ten yards from it are a number of broad shallow muddy 

 pools. At the lower end of the water-course and about thirty 

 yards from the bazaar is a swampy piece of land covered with thick 

 trees and shrubs, and containing a number of deep clear pools in 

 which water plants and weed have grown. The adults of the three 

 species A. rossi, A. culicifacies, and A. fuliginosus were present 

 in the houses of the bazaar, and we should have expected that the 

 larvae of all the species would have been found together in some 

 or all of the breeding places. This, however, was not the case. In 

 the irrigation channel no other larvae than those of A. culicifacies 

 \vere ever found, in the shallow muddy pools no other larvae than 

 those of A. rossi, and in the clear deep pools under the trees no 

 other larvse than those of A. fuliginosus. It is evident therefore 

 that each of these species had selected a particular kind of breeding 

 place. The plan of the Royal Artillery lines in Mian Mir, given 

 on the following page, illustrates the chief breeding places of 

 " anopheles " in this portion of the cantonment. The Iarva3 of A. 

 culicifacies were confined almost exclusively to the irrigation canals, 

 while those of A. rossi were present only in the numerous rain 

 formed pools which covered the plain on every side. 



In another part of Mian Mir an example of selection of breeding 

 places by another species of " anopheles " was found. In this 

 place several species were present in the barracks of the native 

 troops, and there were abundance of breeding places of different kinds 

 near. The larvse of only one species, however, viz., A. stephensi 

 were found in the earthenware vessels of water kept in the lines, 

 and the larvae of this species were never found in any of the 

 other breeding places, a good example of selection of a breeding 

 place by this species. 



The breeding grounds of the species of " anopheles" at Mian Mir 

 agreed with what had been found for the same species in other 

 parts of India, and it is possible to divide the Indian " anopheles," 



[49 



