154 AGRICULTURAL EXPERIMENT STATION. 



3. The thorax is golden brown ; the abdomen not 



banded, aurifer 



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



tending much on the upper surface, most of 



which is black ; the abdomen is not banded, triseriatus 



c. Species in which the thorax is white-spotted only. 



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

 middle and a U-shaped white mark at base ; 



the abdomen is banded rcstuans 



II. The thorax is without marks or ornamentation of any kind. 



a. The segments of the abdomen are narrowly banded at 



their base. 



1. A moderate-sized brownish species, with the bands 



of the abdomen of moderate width, pipiens 



2. A somewhat darker, longer-legged species, with 



very narrow regular abdominal bands saHiiarius 



b. The segments of the abdomen are narrowly banded at 



their apex only. 

 I. A small, slight, blackish species, tcrritans 



c. The abdomen has no bands or only the merest indica- 



tions of them. 

 I. A uniformly dark brown species of moderate size, melaniirus 



C. TABI.K TO DETERMINE THE MOSQUITO LARVJ?, FOUND IN NEW 



JERSEY. 



1. Antennas pendant from the front of the pointed head, with 



four long, curved apical spines, 



Without a siphon or breathing tube on the eighth abdom- 

 inal segment, Sayomyia alhipes 



With a siphon or breathing tube on the eighth abdominal 



segment, Corctlira cinctipes 



2. Antennas not pendant, arising from near the center of the 



anterior part of the head and folding back against it ; 

 head very large ; size very small ; a siphon or anal 



breathing tube present, Corcthrella hrakeleyi 



Antennas not pendant, arising from the sides of the head, ... 3 



3. No siphon or breathing tube on the eighth abdominal seg- 



ment, . Anopheles 4 



A siphon or breathing tube on the eighth abdominal seg- 

 ment, _ 5 



4. Antennae yellowish ; tracheal gills moderate in size, | ^^alVlipelinis 



Antennas shorter, brownish ; tracheal gills short, crucians 



5. Hair tufts on thorax and abdomen simple, sparse, or absent, 6 

 Thorax and abdomen with star-shaped or stellate hair 



tufts, Uranotccnia sappliirina 



6. Abdomen with four tracheal gills at tip, 7 



Abdomen with two tracheal gills only; a small whitish spe- 

 cies, with head rounded and thorax subquadrate 



IVycomyia smitJi ii 



7. Antennae arise from the sides of the anterior part of the 



head, 8 



Antennje arise from near the middle of the sides of the 

 head ; the mouth brushes forming a club at the sides 

 of the mouth ; a very large species, Psorophora ciiiafa 



8. The scales of the eighth abdominal segment are separate, . . 10 

 The scales of the eighth abdominal segment, 5 to 8 in num- 

 ber, are arranged on a band, 9 



