66 



orders Lepidoptera (moths), Hemiptera (aphides, 

 green flies, etc.), Heteroptera (plant bugs), Neu- 

 roptera (caddis flies, stone flies, white ants). Pick 

 out any mosquito-like flies. They will probably 

 belong to the Chironomidae. Note the absence of 

 proboscis, the delicate transparent structure. .Note 

 the plumed head of the male (as in the true 

 mosquito) and the less conspicuous antennae of 

 the female. Examine the wings under a strong 

 lens or a low power of the microscope, and note 

 that the wing veins are bare and do not carry any 

 scales. Note that true mosquitoes are not seen 

 around the lamp. 



2. Examine, with a light, some wall which 

 has been only dimly illuminated by the lamp, i.e., 

 some wall at the . distance of several yards, and 

 note true mosquitoes resting upon this. Capture 

 several of these by placing a tumbler over them, 

 and kill them by pufFmg in a little tobacco smoke. 

 Observe that they have a distinct proboscis. 

 Observe the 'plujned' male and the female without 

 plumes. Examine the wings under a strong lens 

 or low power objective, and note the scales 

 attached to the wing-veins. ' 



The specimens caught will probably be speci- 

 mens of Culex. If near a swamp or jungly place 

 there may be Taeniorhynchus, Mansonia, and 

 possibly Anophelines. Observe the hunchback 

 attitude in the case of most of the mosquitoes 

 caught. If an Anopheline should by chance be 

 caught, note the striking difference in the genefal 

 appearance, the attitude, and the spots on the 

 wings. 



3. Observe in stuffy, furnished rooms, offices, 

 etc., the presence of mosquitoes feeding actively 



