30 N. J. Agricultural Experiment Station, Bulletin 348 



Eye and Hand-lens Key to the Larvae of the More Common Species 



A. Siphon or breathing tube so very short as to seem absent ; larvae lie 



parallel with the surface of the water. 



Anopheles punctipennis. (p. 96) 



Anopheles qiiadrimaculatus. (p. 100) 



Anopheles crucians, (p. 95) 



B. Siphon or breathing tube distinctly present. 



I. Antennae arising from near middle of sides of the head. Very large 



species Psorophora ciliata. (p. 120) 



II. Antennae arising from sides of anterior of head. 



1. Breathing tube sharp-pointed, spike-like. 



Mansonia perturbans. (p. 107) 



2. Breathing tube normal with a blunt end. 



a. Found in fresh water ; breathing tube medium length 2]/^ or 3 

 times as long as broad ; head with 2 or 3 small colored patches, all 

 in front of base of antennae Aedes sylvestris. (p. 104) 



b. Found in fresh water ; breathing tube 3J/2 times as long as broad ; 

 antennal tuft near the middle; head without colored patches. 



Aedes stimulans. (p. 115) 



c. Found in fresh water, woodland pools ; breathing tube 3 times as 

 long as broad; head with 3 colored patches, all back of base of 

 antennae Aedes canadensis, (p. 112) 



d. Found in fresh water ; breathing tube 4 times as long as broad, 

 slightly swollen at base Culcx pipiens. (p. 82) 



e. Found in brackish water ; breathing tube fully 5 times as long as 

 broad, tapering evenly from base to tip. 



Culex salinarius. (p. 41) 



f . Found in fresh water ; breathing tube about 8 times as long as 

 broad, slightly constricted at middle. .Ci//c.v territans. (p- 153) 



g. Found in fresh water; breathing tube about 3I/2 times as long as 

 broad ; antennal tuft decidedly before the middle ; head with one 

 larger and several small colored patches. 



Aedes abfitchii. (p. 118) 



h. Found in salt or brackish water ; breathing tube hardly 2 times 



as long as broad ; head hardly more than one-half width of 



thorax Aedes sollicitans. (p. 31) 



i. Found in salt or brackish water ; breathing tube hardly more than 

 1^/2 times as long as broad; head about two-thirds width of 



thorax Aedes taeniorhynchus. (p. 35) 



j. Found in salt or brackish water; breathing tube a little less than 

 3 times as long as broad ; head globular about one-half width of 

 thorax Aedes cantator. (p. 36) 



