Identification Keys 237 



Subdorsal tufts on abdominal segments three 

 to six not as long as one segment ; long lat- 

 eral abdominal tufts at most about as long 



as two segments 61 



61. Scales of comb (twenty-two to thirty in number) 

 with se condary teeth less than one-half as long 

 as the apical tooth. Labial plate having 

 thirty-three to thirty-five teeth. Head un- 

 spotted in living specimens. 



Ochlerotatus pretans. 



Scales of comb with secondary teeth at least 

 three-fourths as long as the apical tooth. 

 Labial plate of twenty-three to twenty-five 

 teeth. Tuft A, one- ; B, two- or three- 

 haired Ochlerotatus subcantans. 



