l 9 S 
(i 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 : 
1. M.rossi 2. M. nigerrimus 3. M. listoni 
4. N. maculatus 
