8o 



SPECIES OF ANOPHELIN.E 



[CH. 



Markings. Wings. Unspotted. 

 Palps. Unhanded. 

 Legs. Entirely unornamented. 



Scale structure. Head scales narrow and linear, not expanded as 

 in all other Anopheles. No scales on pro- 

 thorax, mesothorax or abdomen. 

 Species. 



A. nimba. Theobald. 

 A. aitkeni. James. 

 A. culiciformis. James and Listen. 

 A. corethroides. Theobald. 

 Synonymy. 



A. pallida. Ludlow = ^. aitkeni (James). 

 A. fragilis. Theobald A. aitkeni (James). 

 A. treacheri. Leicester A. aitkeni (James). 



Differentiation of species. 

 Thorax adorned. 



Silvery median and lateral lines . . A . nimba. 



No silvery lines . . A . corethroides. 



Thorax not adorned. 



Anterior forked cell very long . . . . A . aitkeni. 



Anterior forked cell not unusually long A. culiciformis. 



Group 2. Second segment of female palps not disproportionately long, 

 terminal segment not less than half length of penultimate 

 (orthodactylous). 

 (AnophelesMeigei}, sensu. James. Ty pe species A. maculipennis. Meigen.) 



Fig. 33. Anopheles bifurcatus. (Group 2.) 



General characters of group. 



Appearance. Attitude Anopheles-like. Mostly large species with 

 thin palps and slender limbs. 



