56 



F. W. EDWARDS — FURTHER NOTES ON AFRICAN CULICIDAE. 



This species is difficult to distinguish from C. pipiens until the male genitalia 

 are mounted and examined microscopically ; when this is done, however, the 

 differentiation is easy. 



As in C. pipiens, the harpagones are divided into four plates (not three, as 

 Dyar and Knab say), but these have a very different structure and arrangement 

 (fig. 4). Males are usually somewhat smaller than those of C. pipiens ; females 

 also are a trifle smaller on the average, and have the upper fork cell shorter than 

 in 6. pipiens. 



Culex fa.tiga.ns has a wider distribution in Africa than has been stated pre- 

 viously. I can confirm its occurrence in the following localities from examination 

 of male specimens :— 



Cape Colony : Cape Town ; Transvaal : Onderstepoort (Dr. Theiler) ; 

 Natal : Pietermaritzburg, Durban (Dr. S. R. Christophers) ; Nyasaland : 

 Zomba (Dr. C. W. Daniels, Dr. Gray) ; British East Africa : Mombasa 

 (Dr. J. D. McKay, S. A. Neave), Nairobi (H. J. Mackinder) ; Zanzibar : 

 Zanzibar Island (Dr. W. M. Aders), Pemba Island (Dr. R. O' Sullivan Beare) ; 

 Somaliland : Bulbar (Dr. R. E. Drake-Brockman) ; Uganda: Entebbe 

 (Dr. Low); Sudan (H. H. King, Dr. A. Balfour); BELGIAN Congo : 

 Leopoldville (Dr. Dubois) ; N. Nigeria : Lokoja (Dr. C. F. Watson), Sokoto 

 (Dr. J. M. Dalziel); Gold Coast: Accra (Dr. W. M. Graham, Dr. A. C. Connal). 



Fig. 5. — Cidex pallidocephalus, Theo. 

 Hypopygium from beneath (slide preparation). The two leaf-like appendages to the lateral 

 processes of the side pieces are an unusual feature for a Culex, and may not be normal in this 

 species. 



Culex pallidocephalus, Theo. 



C. pallidocephalus, Theo. (Q only), First Rept. Welle. Lab. p. 73 (1904) 



\<3 = C. decens], 

 C. stoehri, Theo., Mon. Cul. iv, p. 419 (1907). 



C. fjuasif/uiarli, Theo. (J only), Mon. Cul. v, p. 374(1910) [Q = C. pipiens]. 



This species is quite distinct from C. pipiens and C. fatigans, and is not very 



difficult to identify. The thorax, instead of being almost uniformly reddish 



