APPENDIX 
VII 
Length — 4-5 mm. 
Habitat — Freetown, Sierra Leone (Austen), Gambia (Dutton). 
Time of capture — September (Freetown), Austen ; Gambia (in November), Dutton. 
Observations — Described from a single female from Freetown ; bred from water in a drain by Mr. 
Austen. 
A specimen sent me by Dr. Dutton, from Gambia, is evidently this species, but it is rather too 
damaged to say definitely. Dr. Dutton found a filarial embryo in the thoracic muscles. 
f 
XI. Culex thalassius. N. sp. 
Proboscis with a narrow median white band. Thorax dark-brown, with narrow deep golde..-biown 
curved scales. Abdomen dark brownish-black, with narrow basal grey bands, often absent ; penultimate 
segment with lateral white spots only ; pleurae very 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. 
9 . Head deep brown, with narrow-curved, pale greyish scales and black upright forked ones ; 
palpi black ; proboscis black, with a narrow distinct pale band ; antennae brown ; clypeus black. 
Thorax deep brown, with narrow rich brown curved scales ; scutellum brown, with narrow golden- 
brown curved scales, and deep brown border-bristles ; pleurae very pale and shiny grey ; metanotum deep 
brown. Abdomen black, with narrow basal white bands, or unbanded with traces of basal white lateral 
spots, venter dark, with broad basal grey bands. 
Legs black, bases pallid, also venter of femora, apex of femora, and to some extent the tibia, pale ; 
tarsi and metatarsi with narrow pale basal bands, indistinct on the last two tarsi ; hind metatarsi and tibiae 
of about equal length. 
Wings with the veins with brown scales ; fork-cells rather short, their bases about level ; the first 
submargtnal a little longer and narrower than the second posterior, its stem a little more than halt the 
length of the cell ; stem of the second posterior about two-thirds the length of the cell ; posterior cross- 
vein nearly twice its own length distant from the mid. 
Length — 4/5 mm. Habitat — Gambia. 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. 
The species is very variable ; some show distinct abdominal banding, others none at all. It 
somewhat resembles C. duttoni, but is smaller, more fragile, and the legs have only faint basal banding, 
and the fork-cells are slightly different. 
This species and C. duttoni come very close together, but they are certainly distinct. 
XII. Culex tigripes. Grandpre 
(Les Moustiques. (1901.) Grandpre. Mono. Cu/icid. II, p. 34. (1901.) Theobald) 
A series of ten $ 's and 9 ' s taken at Bathurst and McCarthy Island during October. Some 
specimens were taken on the sides of a discarded well ; the majority were hatched from larvae taken in 
canoes, and also from a pool. 
This large spotted-legged Culex, with its apical pale abdominal bands, seems to be generally 
distributed over Africa, but so far has not been recorded further south than Natal, as well as occurring 
in Mauritius and Australia. It is the species that Dr. Bancroft calls the ' long-lived mosquito.' Some 
of the specimens are very small, not more than 5^5 to 6 mm., others are as much as 7 mm. 
