Genus Culex. 169 
pale grey. Legs deep brown, with faint pale bands to some of 
the mid and fore tarsi ; apices of tibiae pale, hind legs unbanded. 
Bases of the fork-cells nearly level. 
2. Head deep brown, with narrow-curved pale greyish scales 
and black upright forked ones; palpi black ; proboscis black, 
with a narrow clear pale band ; antennae brown ; clypeus black. 
Thorax deep brown, with narrow rich brown pale scales ; 
scutellum brown, with golden brown narrow-curved scales and 
deep brown border-bristles ; pleurae very pale shiny grey ; meta- 
notum deep brown. 
Abdomen black, with narrow basal white bands, or unbanded, 
with traces of se white lateral spots ; venter dark, with broad 
basal grey bands. 
Legs black, bases pallid, also the venter of the femora, the 
apex of the femora, and to some extent the tibiae, pale; meta- 
tarsi and tarsi with narrow basal pale bands, indistinct on the 
last two segments ; hind metatarsi and tibiae of about equal 
length. 
Wings with brown scales ; fork-cells rather short, their bases 
about level ; the first sub-marginal cell longer and a little 
narrower than the second posterior, its stem a little more than 

Fig. 91. 
Wing of Culex thalassius. 9. n. sp. 
half the length of the cell; stem of the second posterior not 
quite two-thirds the length of the cell; posterior cross-vein 
more than its own length distant from the mid-cross vein. 
Length.—4°5 mm. 
Habitat.—Gambia (Dutton). 
Time of capture.—October and November. 
Observations.—Described from a series taken and bred by 
Dr. Dutton. The larvae were mostly taken in a drain of tidal 
water and others from a pool in a mangrove swamp, others from 
a canoe on the foreshore, and some from a pool of tidal water 
that had soaked through sand into a drain. 
