21 
region of the wings ; scutellum trilobed ; mid-lobe with small, flat, dark 
brown scales, and traces also of a few white ones; lateral lobes small, 
almost tuberculate, furnished with eight long bristles, and a patch of 
flat dull white scales. Abdomen clothed with dark brown and almost 
black scales; venter with broad, pale, basal bands interrupted by a 
median ochreous line which broadens towards the apex Legs 
uniformly brownish-black ; femora pale beneath ; knees and tibio t.ir^.il 
articulations pale; hind tibiae with a broad apical white band 
Wings with the first submarginal and second posterior cells about 
equal in length ; posterior cross-vein about its own length distant 
from the mid. 
Length about 5 mm. 
Locality: — A single ? taken in a water-closet at Kasongo, April 
7th, 1905. 
Culex albitarsis, Theobald 
Localities: —Boma ; Kasongo (Feb.). 
Circumstances of capture: —Adults were taken during the day in 
the open, and at night in a European’s house. 
Breeding places: Larvae taken from swamps produced adults in 
captivity. The pupa of this mosquito is particularly large. 
Culex annulioris, Theobald 
All four specimens of this species were obtained from larvae caught 
in a grassy swamp near Leopoldville. 
Culex dissimilis, Theobald 
Specimens were caught in a tent near Tumba, October 26th, 1903 
Culex fatigans, Weidemann 
Localities: — Boma; Matadi; Wathen ; Leopoldville (Dec); 
Mswata ; Irebu; Coquilhatville ; Bamamia; Lisala; Basoko; Stanley 
Falls; Kisui ; Kasongo (Feb.). 
Circumstances of capture :— Imagines were taken by day and by 
night in the dwelling-places and in the mosquito nets of both 
Europeans and negroes. They were also caught at noon on ste imer^ 
