222 



Mosquitoes 



14. Five or six spines in comb, three of the teeth on 

 each spine much larger than the others, the 

 central tooth longest and stoutest, spines in a 

 single row on a sort of thickened, chitinous 

 band ' GrabJiamia. 



1 5. Antennae sigmoid, tuft far up, in notch, a pair of 

 long spines at three-fourths of distance from 

 notch to tip of antennae. Ventral tufts of 

 ninth segment extending nearly to the anterior 

 end of the segment Ciilicella* 



16. Tufts D and E two- to three-branched, small. 



Antennae if bent backward would not reach 

 hind margin of head. Not more than three 



tufts in front of barred area Theobaldia. 



Tufts D and E four- and five-branched, quite 

 large : or two- and three-branched and quite 

 small ; if the latter, the antennae are elongated 

 and if bent backward would reach beyond hind 

 margin of head, and there may be four tufts 

 in front of barred area Culiseta. 



17. Comb over two rows, teeth spatulate, fringed at 



the top. Antennal tuft in notch Culex. 



Comb one or two rows, teeth lanceolate. 



Melanoconion. 



18. Breathing tube without a pecten and having a 



single tuft. Saddles of chitin on segments 



seven and eight Pneumaculex. 



Breathing tube not as above 19 



1 Paragraphs numbered 14, 15, and 20 seem to be incomplete 

 couplets, but are really portions of the couplets referring to these 

 numbers, and are transferred to their present position in order to show 

 the closest relationship, or systematic position, of the genera as in 

 Mr. Coquillett's classification. 



