196 A Monograph of Culicidae. 
Wings with the first sub-marginal cell longer and narrower 
than the second posterior cell, their bases nearly level ; stem of 
the former equal to nearly half the length of the cell, stem of the 
latter nearly as long as the cell; posterior cross-vein not quite 
twice its own length distant from the mid cross-vein ; scales on 
the branches of the first fork-cell rather thick. 
Length.—3°5 to 4 mm. 
Habitat.—St. Vincent, Barbados (Dr. Low). 
Time of appearance.—June (Barbados). 
Observations.— Described from a single female and several 
males bred by Dr. Low. The larvae were obtained in a swamp at 
Barbados, and in a marsh behind Kingstown, St. Vincent. It is 
a very small delicate Culex, very like C. nigritulus, Zetterstedt, 
but clearly distinct, yet by means of a hand-lens the only difference 
is seen in the ¢ palpi of nigritulus being banded with two bands. 
The scale structure of the thorax is, however, different : in this 
species the scales are very thin, narrow, and curved, and deep 
bronzy-brown. 
CULEX BILINEATUS. ND. Sp. 
Head brown, darker at the sides, with a narrow pale border 
round the eyes. Thorax brown, with paler dull golden orna- 
mentation and two black bare parallel median lines slightly 
expanded in front; the pale scales occur in front between these 
lines, as two irregular spots on the dorsum and on each side in 
front. Legs long, dark brown, unbanded. Abdomen with traces 
of banding on the second to fourth segments in the ?, and with 
white basal lateral spots, which show dorsally on the last two 
segments; in the ¢ all the segments basally pale banded. 
@. Head dark brown, with brown narrow-curved scales, 
a few grey ones especially in the middle, where a distinct median 
parting occurs, numerous black upright forked scales behind, and 
pale scales forming a narrow border. round the eyes ; proboscis 
dark brown ; palpi dark brown, rather densely scaled, with a 
small apical joint and a long penultimate joint ; antennae dark 
brown, basal joint bright testaceous, dusky on the inside, 
second joint slightly swollen, testaceous at the base; clypeus 
dark brown, with an apparent transverse sulcus. 
Thorax dark brown, with very narrow curved brown and 
pale dull golden scales, with two black nude parallel lines, 
slightly widening in front, with three prominent rows of long 
dark bristles, one between the two parallel nude lines, and very 
