230 MOSQUITO ERADICATION 



1. The thorax is yellowish; brownish abdomen with narrow 

 white bands, Aedes hirsuteron Theob. 



2. The thorax is golden yellow. The abdomen is almost 

 black, with broad, white bands, Aedes abserratus Felt. 



3. The thorax is golden brown; the abdomen not banded; 

 the legs are black, Aedes aurifer Coq. 



4. The thorax is silvery-white at the sides, not extending 

 much on the upper surface, most of which is black; the 

 abdomen is not banded, Aedes triseriatus Say. 



(c) Species in which the thorax is white-dotted only. 



1. There are two small, white dots on each side of the 

 middle and a U-shaped mark at the base; the abdomen 

 is banded, Culex restuans Theob. 



(d) Species in which the entire under surface is silvery white or 

 yellowish. 



1. A small form, having dorsal surface black; stripes on the 

 thorax are irregular. Wyeomyia smithii Coq. 



II The Thorax is Without Marks or Ornamentation 



(a) The segments of abdomen are narrowly banded at their 

 bases. 



1. A small dark-brown species; abdominal bands wider in 

 the middle than at sides except on seventh segment, 

 which usually has a narrow band, broad at the sides, 

 Aedes fuscus O. S. 



2. A moderate-sized brownish species with the bands of 

 abdomen of moderate width, Culex pipiens Linn. 



3. A somewhat darker, longer-legged species, with very 

 narrow, regular abdominal bands, Culex salinarius Coq. 



(b) The segments of the abdomen are narrowly banded at their 

 apices only. 



1. A small, slight, blackish species, Culex territans, Wlk. 



(c) The abdomen has no bands or only the merest indications of 

 them. 



1. A uniformly dark-brown species of moderate size, Culex 

 melanurus Coq. 



2. Species having thorax yellowish-brown, somewhat 

 polished, with a thin, bluish-gray fresting, Anopheles 

 barberi Coq. 



LARVAE 



Antennae arising from the sides of the head; antennae not pendant 



1. No siphon or breathing-tube on eighth abdominal segment, Anopheles 



(2). 

 A siphon or breathing-tube on eighth abdominal segment (3). 



2. Antennae yellowish; tracheal gills moderate in size, A. punctipennis, 



A. quadrimaculatus. 

 Antennae shorter, brownish; tracheal gills short, A. crucians. 



