Genera of Culicidae. 
93 
FAMILIES WITH WHICH THE CULICIDAE MAY BE 
CONFUSED. 
The only insects with which the mosquitoes of the family 
Culicidae can be confused are certain of the— 
(i) Cecidomyidaey 
(ii) Chironomidae, 
(iii) Hhyphidae, 
(iv) Tipulidae. 
From the Cecidomyidae they can at once be told by their 
more complicated venation than in that family. In Cecidomyidae 
the venation is simple (Fig. 23, D), no fork-cells being present, 
and only four long veins at the most; so that a comparison of 
Culex with the scaly Lasioptera, &c., will at once enable the 
observer to separate them. In the majority of Cecidomyia the 
wings and body are hairy, not scaled. 
From Chironomidae (C) they can be separated by the simpler 
venation, by their more sturdy structure, and the persistent 
occurrence of scales, which are absent in the Chironomidae or 
midges. 
The Hhyphidae (A) have been sent me as Culicidae ( Anopheles ), 
but they present such marked differences both in general form 
and structure that no reference need be made to this family, as 
a figure is given. The Hhyphidae are quite harmless. 
It is not infrequent to have small Tipulidae sent as mosquitoes. 
Numbers of the so-called Winter Gnats ( Tricliocera , B) have been 
received from Scotland and England, and other small Tipulidae 
from China and India (sp. ?). Some of the smaller members of 
this family bear a superficial resemblance to Culicidae , but when 
at rest their bodies lie parallel with the surface and upon it ; 
in Culex the body is distant from the resting surface. 
THE GENERA OF CULICIDAE. 
The original genera accepted and formed by Meigen, in 1818, 
for the Culicidae were Culex , Anopheles , Aedes and Corethra . 
The genus Culex was instituted by Linnaeus (Fn. Suec. 1790), 
