178 A Monograph of Culicidae. 
Wings with the veins clothed with typical Culex scales ; the 
first sub-marginal cell longer and narrower than the second 
posterior cell, its base much nearer the base of the wing than 
that of the,latter ; stem of the first sab-marginal very short, of 
the second posterior nearly as long as the cell; posterior cross- 
vein about three times its own length distant from the mid 
cross-vein. Halteres with grey stem, with a black streak at the 
“elbow” and a black knob. 
Length.—4 mm. 
Habitat.—Sao Paulo, Brazil (Dr. Lutz). 
Observations.—Described from some specimens sent me by 
Dr. Lutz, who proposed the name I have adopted. It seems to 
vary considerably. I think it comes well in the genus Culex, 
although the wing scales are dense apically, giving it the appear- 
ance of a Melanoconops. The cephalic ornamentation is very 
marked. 
CuLEX MARINUS. Theobald. 
(Mono. Culicid. I., p. 396, 1901.) 
Six ¢’s of this species have been sent by Dr. Bancroft from 
Queensland taken in December and January. One specimen 
bred from a larva taken in salt water of sp. gr. 1050. They 
breed in fresh as well as salt water. ° 
In the description of this species given in Vol. I, p. 396, 
no mention is made of the mid ungues of the male; these are 
rather peculiar. The larger claw has a small basal tooth and a 
blunt process scarcely to be called a tooth, on the apical half ; 
the smaller unguis is about half the size of the larger and is 
uniserrated. 
The ¢’s vary from 5 to 6 mm. This insect was sent by 
Dr. Bancroft as C. vigilax, Skuse. The latter species can easily. 
be told from C. marinus by the much broader and darker scales 
on the mesonotum. Culex marinus, according to Dr. Bancroft, 
is a day flier. This is the species he experimented with in 
connection with the nematode Filaria immitis, but found the 
embryos of the canine parasite did not metamorphose in it and 
after a few days disappeared.* 
Several specimens recently received — the first sub- 
marginal cell ending nearer the base of the wing than that 
of the base of the second posterior cell as in C. vigilaxw. The 
broad banding on the proboscis rather indistinct. 
* Jour. and Proc. Roy. Soc., N. S. Wales, vol. xxxv., p. 41, 1901. 
