22 N. J. Agricultural Experiment Station, Bulletin 348 



siphonal spines with 2 or 3 small teeth, sometimes simple ; fresh 



water Aedes trivittatus. (p. 144) 



Scales 16-22 with rounded apex and slender lateral spines ; 12 to 16 

 siphonal spines, with i to 4 small teeth on both sides ; head maculate ; 



salt marsh Aedcs taeniorhynchus. (p. 35) 



Scales 20-40, with stout apical and slender lateral spines; 16 to 24 

 siphonal spines with i to 5 small teeth ; head generally immaculate ; 

 salt marsh Aedes sollicitans. (p. 31) 



15. Scales rather broad 16 



Scales elongate 17 



16. Scales 35-40, with 3 stout apical and smaller lateral spines ; 16 to 20 

 siphonal spines with i to 3 small teeth ; head maculate ; salt-marsh 



breeder Aedes cantator. (p. 36) 



Scales 25-50, with one very stout apical and slender lateral spine ; 

 16 to 22 siphonal spines, with i or 2 large, and 4 to 6 smaller teeth 

 on basal half ; head immaculate ; fresh-water form 



Aedes stimulans. (p. 115) 



17. Only the terminal segment with a dorsal plate or ring 18 



Last two segments with dorsal plates ; antennae very short 



Orthopodomyia signifcr. (p. 132) 



18. Antenna not specially marked or colored 19 



Antenna prominent, white at base, dark at tip. .Aedes aurifer. (p. 148) 



19. Moderate-sized species 20 



Very large larva ; scales 28-34, with long apical and slender lateral 

 spines ; siphonal spines 17-22 with 4 or 5 large teeth basally 



Aedes grossbecki. (p. 146) 



20. Scales 25-50, with short apical and very short lateral spines ; siphonal 

 spines 16-20, with i or 2 teeth at base, i usually very large 



Aedes hirsutcron. (p. 146) 

 Scales 40-45, with 5 to 7 large apical and smaller lateral spines ; 16 to 

 22 siphonal spines, with usually i or 2, rarely 3 or 4 small teeth. 



Aedes trivittatus. (p. 144) 

 Scale 25-50, with small apical and smaller lateral spines ; 16 to 24 

 siphonal spines, with 4 or 5 serrations on basal half; antenna dark 

 at tip Aedes canadensis, (p. 112) 



21. Antennal tuft above the middle. 



Anal siphon of moderate length, sides a little inflated ; tracheal gills 



moderately long Culex pipiens. (p. 82) 



Anal siphon very long, rather slender, slightly tapering to tip ; head 

 narrower than thorax; tracheal gills short. . .CM/^.r salinarius. (p. 41) 

 Anal siphon very long and slender ; a little constricted centrally, head 

 as wide as thorax ; tracheal gills moderate or long 



Culex territans. (p. 153) 

 Anal siphon very long, stout ; tapering uniformly. Scales about 80. 



Culex dyari. (p. 136) 

 Antennal tuft below middle. 

 Scales 24-30, antenna not arising from an oflfset 



Aedes abfitchti. (p. 118) 



