260 F. W. EDWARDS—THE AFRICAN 
thorax (not always visible), and the rounded abdominal bands, it makes the 
species an easy one to identify. C. univittatus has the same spotted thorax, 
striped tibiz and rounded abdominal bands, but differs in the unbanded proboscis 
and legs. The tibial stripe, too, in the last-named species is most distinct on the 
hind legs, while in C, duttonz it is particularly conspicuous on the middle legs. 
In the Q type of C. dissimilis [ cannot make out the markings of the tibiae, and 
the fork-cells are different ; in fact this specimen looks much more like 
C. thalassius than C. duttoni, but since the males associated with it are un- 
doubtedly all C. duttont I have included C, dissimil’s here as a synonym. I feel 
all the more confident in doing this, since Theobald (Entomologist, 1908, p. 107) 
has already pointed out that C. hirsutipalpis is only a large form of C. dissimilis. 
C. hirsutipalpis differs from the typical form in having some pale scales at the 
apices as well as at the bases of the abdominal segments, but there is no doubt 
TENZiW“ 
Fig. 4.—Legs of Culex: (w) Hind leg of C. quasigelidus, Theo. ; (6) mid leg of C. duttoni, 
Theo. ; (c) mid leg of C. theileri, Theo. ; (d) hind leg of C. univittatus, Theo. 
that this is only a variation, and it is hardly worth while retaining a separate 
name for it. C. anarmostus was described from a small specimen ; this species, 
like many other mosquitos, varies very greatly in size. One specimen shows a 
remarkable abnormality in the neuration: the second vein is unbranched, and the 
upper branch of the fourth vein is only represented by a stump, so that the fork- 
cells are absent. C. condylodesmus is probably a synomym, but the description 
does not quite agree, as the band of the proboscis of the female is described as 
being broader and more distinct than in C. dissimilis. 
Common throughout West Africa ; Nyasaland ; Transvaal. 
