234 Mosquitoes 



44. Spines of tube with teeth on one side only. 45 

 Spines of tube with teeth on back and front. 



Comb scales with teeth graded from side to 

 apex, but with no strongly differentiated 



apical tooth. (Fig. 51, page 248) 



Ochlerotatus tczu iorhynchus. 



45. Comb scales with apical tooth decidedly stout- 



er and sometimes longer than secondary 



teeth 46 



Comb scales with apical tooth of nearly equal 

 size to secondary teeth; tufts of tube at its 

 middle Ochlerotatus lazarensis. 



46. Ninth segment ringed with chitin. Comb 



scales with apical teeth decidedly longer 

 than secondaries. Tube at most two and 



one-half times as long as broad 47 



Ninth segment with saddle of chitin. Comb 

 scales with apical teeth stouter but not longer 

 than secondaries. Tube three and one-half 



to four times as long as broad 



Lepidoplatys sylvicola. 



47. Body sparsely covered with minute, simple 



hairs (visible under a two-thirds objective). 

 Labial plate with thirty-one to thirty-three 



teeth 49 



Body without minute hairs 48 



48. Breathing tube at least three times as long as 



wide Ochlerotatus mite he lies. 1 



Breathing tube not over twice as long as wide. 

 Body with papillate appearance under a one- 

 sixth objective. Labial plate with at most 

 25 teeth. (Fig. 32, page 159.) 



Ochlerotatus sollicitans. 



1 This species appears at times to have tuft B two-haired on one 

 side, but as the specimens examined were skins in poor condition, I 

 have not been able to determine whether it is ever two-haired on 

 both sides. 



