24 THE MOSQUITOES OF NEW JERSEY 



13b Antennae with tuft well beyond the middle : 14 



14a Air-tube with four paired, evenly spaced tufts, in line; both pairs 



of dorsal head-hairs single: Culex apicalis Adams (was territans 



Walk.) 

 14b Air-tube with four (sometimes more) paired tufts, the next-to-last 



tuft moved out of line; dorsal head hairs multiple: 15 



15a Air-tube six or more times as long as wide, the sides straight, with 



little or no tapering; anal gills small, tapered, not as long as the 



anal segment: Culex salinarius Coq. 

 15b Air-tube less than six times as long as wide, the sides curved, 



tapering rather rapidly after the middle; gills rather broad, tips 



bluntly pointed, longer than the anal segment: Culex pipiens Linn. 

 16a Mouth brushes fitted for holding, or air-tube or antennae very 



much inflated: 17 



16b Without these peculiar modifications : 20 



17a Antennae very large, swollen towards the tip: Psorophora discolor 



Coq. 

 17b Antennae cylindrical, not swollen: 18 



18a Antennae about one-third as long as the head: Psorophora ciliata 



Fabr. 

 18b Antennae as long as or longer than the head: 19 



19a Dorsal head hairs multiple; pecten on air-tube of five hairs; a two- 

 haired tuft at the outer third: Psorophora columhiae D. & K. 

 19b Dorsal head-hairs double; air tube with a small pecten of few 



teeth; hair tuft lacking: Psorophora ferox Humb. 

 20a Anal segment ringed by the dorsal plate (see Fig. VII) : 21 



20b Anal segment not ringed by the dorsal plate, i.e., plate chitiniza- 



tion interrupted on ventral line more or less broadly : 26 



21a Air-tube moderate, about three times as long as wide: 22 



21b Air-tube short, less than three times as long as wide: 23 



22a Anal gills extremely long and tracheate: Aides dupreei Coq. 

 22b Anal gills less than twice as long as the anal segments: Aides im- 



placahilis Walk. 

 23a Comb of eighth segment of about six scales: Aides atlanticus 



D. & K. 



Fig. VII. Aides sollicitans Walker. A. Antenna. B. Antennal hair tuft. C. 

 Head hairs. D. Hair tufts. E. Ventral brush or anal tuft. F. Anal gills or tra- 

 cheal gills. G. Siphon or breathing tube. H. Patch of scales. I. Pecten, pecten 

 spines or siphonal spines. J. Hair tufts of air tube or siphonal hair tuft. Fig. 

 VIII. Aides vexans Meigen. A. Antenna. B. Antennal hair tuft. C. Head hairs. 

 D. Hair tufts. E. Ventral brush or anal tuft. F. Anal gills or tracheal gills. 

 G. Siphon or breathing tube. H. Patch of scales. I. Pecten, pecten spines or 

 siphonal spines. Fig. ix. Culex territans Walker. A. Antenna. B. Antennal 

 hair tuft. C. Head hairs. D. Hair tufts. E. Ventral brush or anal tuft. F. 

 Anal gills or tracheal gills. G. Siphon or breathing tube. H. Patch of scales. 

 I. Pecten, pecten spines or siphonal spines. (All drawn from Howard, Dyar 

 & Knab.) 



