195 



(c) In some species of Anophelines a single pair 

 of palmate hairs, similar to those on the abdominal 

 segments, are found upon the thorax. In others they 

 are rudimentary or absent. The presence of a well- 

 developed palmate hair on the thorax is of specific 

 importance. 



(i) It is well developed and functionally active 

 in M. culicifacies, M. listoni, P. jeyporensis. 



(ii) It is rudimentary or absent in other larvae. 



7. The Abdomen. The first seven segments are 

 very similar in shape. The eighth carries the opening 

 of the air-tube, and the ninth the anal papillae and 

 large hairs. 



8. The Palmate Hairs. The most important 

 appendages of the abdominal segments are certain 

 small fan or palm-leaf-shaped hairs attached by a short 

 stalk to the outer dorsal portions of certain of the 

 segments (Fig. 65). 



Place the larva under a coverglass in a drop of 

 water or use a permanently mounted larva. 



3 4 



Fig. 65. Palmate Hairs of Larvae : 



I. M. rossi 2. M. nigerrimus 3. M. listoni 

 .. N.maculatus .- ..: 



