Séance du 24 Décembre 1924 
371 
Siphon four and a half to five times as long as 
broad, with at least sixteen tufts. Mid and inner 
post-antennal tufts exceedingly minute. 
. Culex (. Lasiosiphon ) pluviali s , n.sp. 
1 3 . Siphon not more than three times as long as 
broad, small species . 
. Culex ( Barraudius) pusillus, Macq. 
Siphon at least four times as long as broad, large 
species. Culex laticinctus , Edw. 
14. The first two or three siphonal tufts between the 
last few pecten teeth. ro 
None of the siphonal tufts between the pecten 
teeth .. 16 
io. Siphon four to four and a half times as long as 
broad, the tufts in a single zigzag ventral row. 
.. Culex 1 alicinctus , Edw. 
Siphon over six times as long as broad, the tufts 
in two irregular rows.*. 
. Culex ( Neoculex ) deserticola , n.sp. 
16. Comb of the eighth segment with 7 or 8 teeth in 
a single row. Culex quasi g eli dus, Theo. 
Comb of the eighth segment a patch of nume¬ 
rous small scales . 17 
17. Pecten teeth strong curved and wide apart, with 
two or three small basal denticles only. 
. Culex tipuliformis , Theo. 
Pecten teeth smaller and closer together, with 
larger or more numerous denticles . 18 
18. Siphon not untone jthan five times as jlong as 
broad, the tufts considerably longer than the 
diameter of the siphon. Culex pipiens, L. 
Siphon six or more times as long as broad, the 
