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The exact attitude adopted depends upon the 
species and the situation, whether a vertical or 
horizontal surface on which the Anopheline is resting. 
One very common species (M. culicifacies) at least, 
when sitting on a wall, looks exactly like a small brown 
Culex , since it holds its body parallel with the wall as 
a Culex does. 
Culex. —Mosquitoes of the genus Culex are many 
of them brown mosquitoes of sober hue, e.g., the 
common house Culex , C. fatigans , which is uniformly 
brown without markings. The genus, however, 
contains a very large number of species. In Culex 
mosquitoes the attitude when resting is £ hunchback.’ 
Stegomyia. —The genus Stegomyia is of the greatest 
interest and importance, since it is the one which is 
concerned in the transmission of vellow fever ( Stego¬ 
myia calopus v. fas data). 
These mosquitoes are generally black and white, 
with banded legs and abdomen, and spots on the 
thorax. They are found in houses, and are most 
troublesome mosquitoes from their habit of feeding 
in the day, and their great alertness and persistence. 
Stegomyia are also very common in woods and forests. 
Capture of Mosquitoes and Flies 
i. Place a lamp upon a sheet of white paper, and 
note the insects which are attracted by the light. 
Note insects belonging to the orders Lepidoptera 
(moths), Hemiptera (aphides, green flies, etc.), Heter- 
optera (plant bugs), Neuroptera (caddis flies, stone 
flies, white ants). Pick out any mosquito-like flies. 
They will probably belong to the Chironomidae. 
Note that true mosquitoes are not seen around the 
lamp. 
