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F. W. EDWARDS — THE AFBICAN 



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 tibiae and rounded abdominal bands, but differs in the unhanded proboscis 

 and legs. The tibial stripe, too, in the last-named species is most distinct on the 

 hind legs, while in C. duttoni it is particularly conspicuous on the middle legs. 

 In the Q type of C. dissimilis I cannot make out the markings of the tibite, and 

 the fork-cells are different ; in fact this specimen looks much more like 

 C. tlialassius than C. duttoni, but since the males associated with it are un- 

 doubtedly all C. duttoni I have included C. dissimilis 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. hirsutijmlpis is only a large form of C dissimilis. 

 C. hii'siitipalpis 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 



Fig. 4.— Legs of Culex : (a) Hind leg of C. quasigelidus, Theo. ; (b) mid leg of C. duttoni^ 

 Theo. ; (c) mid leg of C. theileri, Theo. ; (d) hind leg of C. unknttatus, 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. condyhdesmus 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 ; Nyasalaud ; Transvaal. 



