63 



and as long as the proboscis. An examination of 

 the female proboscis will at once determine whether 

 an insect belongs to the sub-family, Anophelina, or 

 one of the other genera (Fig. 14). 



2. The wings in nearly all species of Am- 

 phelines are ' spotted.' The spots can be seen with 

 the naked eye. By the use of the low power of 

 the microscope or an ordinary lens, these spots are 

 seen to be due to the presence of areas of dark 

 scales upon the wing veins, elsewhere covered with 

 light scales. 



Fig. 14. Shewing distinction between palpi of Female Anopheline 

 (right) and a Culicine (left). 



There are a few members of the Anopheline 

 group which, however, have not spotted wings 

 (e.g., A. bifurcatus,.3.nd the Indian yl. immaculatus). 

 Also there are other flies than Anophelines which 

 have spots [e.g., Rhyphus, C. mimeticus (costal spots), 

 the genera Theobaldia and Lutzia). Nevertheless, 

 as a general practical rule, mosquitoes with spotted 

 wings are Anophelines. 



3. The angle which the proboscis makes 

 with the rest of the body is verj^ different in 

 ^KO^/ieh'wes from that of other mosquitoes. InCulex, 

 Taeniorhynchus, or Stegomyia, the proboscis forms 

 a distinct angle with the line of the body (Tae- 

 niorhynchus, iorty-five degrees). In the case of 

 Anophelines, the proboscis continues on in the line 

 of the body (P. stephensi, fifteen degrees). The 



