Identification Keys 229 



22. Antennal tuft below middle. On head three 



large tufts. Thoracic row one with four long 

 hairs in group nearest meson. Tube with 

 two long hairs in line with pecten and beyond 

 it, and two on the dorsum. (Fig. 43, page 



240.) Culex restnans. 



Antennal tuft beyond middle. Tube with 

 tufts 23 



23. Group of hairs nearest meson, in thoracic row 



one, of three long single hairs. Tufts of breath- 

 ing tube mostly of two to four hairs 24 



Group nearest meson of thorax, in row one, 

 with two long single hairs and one long double 

 hair Culex tar sails. 



24. Tufts on tube, five, the penultimate one more 



lateral. Terminal spines of antennae decidedly 

 long, over one-half length of antennas, heavily 

 chitinised, black. All head tufts decidedly 

 long. Tip of antennae very heavily chitinised. 



(Fig. 44, page 241.) Culex salinarius. 



Tufts on tube, four, the penultimate one more 

 lateral ; tube tapering decidedly on the last 

 half. Terminal spines of antennae not very 

 long, not over one-half length of antennae. 

 Head tufts not projecting much, if at all, 

 beyond forward margin of head. Tips of 

 antennae and spines of but slightly heavier 

 chitin than base of antennae. (Fig. 34, page 

 169) Culex pipiens. 



25. Anal gills at least twice as long as breathing 



tube, tapering to tip, containing bunches 

 of tracheoles. Antennae longer than head, 

 strongly sigmoid, with two spines in a notch 

 two-thirds from base of antenna. Comb and 

 pecten six-toothed. Tufts A and B single- 

 haired. (Fig. 39, page 201.) 



GrabJiamia discolor. 



