228 Mosquitoes 



1 8. Antennal tuft in notch and having ten to thirty 



hairs, usually over fifteen. Pecten extending 

 less than half way up breathing tube, not 



more than two teeth separated 19 



Antennal tuft not in notch, of six to eight hairs. 

 Tube with a pair of large tufts about half 

 up on ventral side, mesad of pecten. Pecten 

 runs three-fourths up, last three or four teeth 

 separated. Three small tufts laterad of pecten 

 and four on dorsal side of tube, which is not 

 pubescent. Comb in two rows. 



Ochlcrotatas cincreoborcalis. 



19. Body covered with a distinctly noticeable pilos- 



ity. Two rows in comb. Five plumose tufts 

 on tube. (Fig. 42, page 239.) 



Mclanoconion atratus. 

 Body and head with no noticeable pilosity . . 20 



20. Scales of comb in more than two rows. Tufts 



of tube not plumose 2 1 



Scales of comb in one row. Tufts beginning at 

 end of pecten and extending over five-sixths 

 to top, the tufts of the two sides forming a 

 mesal row of about ten. 



Mclanoconion mclanurus. 



21. Group of hairs nearest meson, in row one on 

 dorsum of thorax, with two long hairs and 

 one short tuft. On head one large tuft, other 

 two represented by one to three hairs (usually 

 one). Tube flares at apex, and bears two 



rows of five tufts each Culex territans. 



Group of hairs nearest meson, in row one on 

 dorsum of thorax, with three or four long 

 hairs and no tuft, or with two long single 

 hairs, or with one long double hair 22 



