Genus Culex. 



451 



Observations. — Walker's type in the Museum is in poor con- 

 dition, but was re-described in Vol. II., p. 111. Fresh material 

 sent me by Professor Felt enables me to give a more com- 

 plete account of it. It is very common in parts of North 

 America, and comes near Culex geniculatus. It is not known 

 how the insect hibernates. It rarely occurs indoors. It appears 

 to be local, and does not travel far. The eggs are apparently 



Fig. 200. 



Culex territans. Walker. 



a, Variations in the labial plate ; b, scales of siphon 

 comb ; c, scale of the comb of 8th segment ; d, 

 antennae. (After Smith.) 



laid in small rafts, but break up rapidly, and the individual eggs 

 then sink to the bottom. 



The larvae are very characteristic, and measure 6-7 mm. 

 long, white, dirty yellow, or pale green in colour, of slender 

 form. The head is pale creamy white, quite immaculate, with 

 orange-coloured mouth brushes \ eyes dark ; antennae large, white 

 in colour, with apical third and base black, becoming abruptly 

 narrowed apically where the lateral tuft arises, surface with 

 hair-like spines, apex with three long bristles, one very short one, 

 and a little joint ; mentum variable with but 6-8 teeth on each 

 side of the apex ; combs of eighth segment composed of 25-50 

 scales which are very narrow and long with long dense apical 



2 G 2 



