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F. W. EDWARDS — REVISED KEYS TO THE 



2. Siphon short, not more than three times as long as its basal width ; 



tufts in a ventral row ... ... ... ... ... ... 3. 



Siphon long, at least four times as long as its basal width (usually 

 much longer) ... ... ... ... ... ... ... 4. 



3. Mandibles large, dentate ; anal segment pointed, longer than 



siphon ; 8-10 pairs of hair-tufts on siphon, all ventral 



tir/ripes, Grp., var. fuscus, Theo.* 

 Mandibles normal ; anal segment truncate, shorter than siphon ; 

 6-7 pairs of hair-tufts on siphon, 4 or 5 ventral, 2 lateral 



Culiciomyia nebulosa (Theo). 



Fig. 6. — Culex ager (Giles), var. ethiojncus, Edw. 



4. Comb of eighth segment with about 40 teeth in a triangular 

 patch 

 Comb of eighth segment with less than 20 teeth ; antennal plume 

 at I or before 



5. 



* This species would fall into the genus Lutsia (= Jamesia) as used by Dyar and Knab, 

 but as there is no tangible adult character to separate it from Culex I prefer not to 

 use it. The larval characters distinguishing it from typical Culex are the predaceous habit, 

 the outwardly folded mouth -brush modified into a prehensile pencil, and the pointed anal 

 segment. 



