Genus Culex. 187 
fifth joints of the tarsi of the last pair of legs are completely white; this 
is the most striking feature of the species. All dark parts are covered 
with abundant scales; the white parts are not coated with them. The 
claws are beautiful brown; those of the first pair are without, those of 
the others have each a tooth. 
The abdomen is brown on the dorsal surface and covered with small 
white scales showing violet reflections at times. The bands and white spots 
described and drawn by Theobald in the ¢ do not seem to exist in the 
?, unless the long sojourn in alcohol has altered the colouring. The 
ventral surface is yellow, with a narrow black band at the extremity of 
the segments. 
Length.—10 mm. (including proboscis). 
Habitat.—Only example of a & known comes from West Africa and 
was caught in July. The only female got up to the present was taken in 
January in the village of Counani, Guiana, by Dr. Mathis. 
It is interesting that the two specimens of this species, the one ¢, the 
other ?, have been collected in countries so differently situated, which 
should make one think that it has a fairly large area of distribution. It 
is true that ships may play an important réle in the transportation of 
mosquitoes from one country to another. 
Note.—I do not feel certain that this is the 2 of my 
species. The scales being absent on the described white parts 
of the legs seems strange ; in albitarsis the white part of the 
legs are densely scaled with white scales.—F. V. T. 
600660. Legs with femora and tibiae spotted or lined. 
CuLEX THEILERI. nN. sp. 
(Plate XI.) 
Thorax deep brown, with reddish-golden narrow-curved scales, 
paler before the scutellum, showing two parallel bare median 
lines in front; pleurae pale testaceous, with grey scales. Pro- 
boscis unbanded. Abdomen covered with deep brown scales, 
with basal creamy-white triangular patches, the base extending 
across each segment, basal segment pale, with two small dark 
patches of scales. Legs unbanded, the femora and tibiae with 
thin rows of white scales ; coxae and venter of femora pallid. 
Wings with typical Culex scales, transparent. 
@. Head brown, with narrow-curved creamy scales, brown 
in some lights, and with deep brown upright forked scales, scales 
around the eyes paler and with inwardly projecting brown 
bristles ; proboscis deep brown, unbanded ; palpi black, with some 
white patches, the apical joint long ; antennae deep brown, basal 
