262 P. W. EDWARDS — THE ArRICAN 



It is curious to notice, that when a species is common to the Ethiopian and 

 and Oriental regions, or when a pair of closely allied species occurs in the two 

 regions respectively, the African form is often much darker in colour than the 

 Eastern. The phenomenon does not seem to be confined to the Colicidab, 

 as I have noticed it in the Tipulid Conosia irrorata, Wied. 



The specimens mentioned by Theobald as having been taken in Australia 

 belong to the concolor form. I have made several preparations of the male 

 genitalia of each form, and can detect no difference vrhatever ; the genitalia 

 are of the ordinary jozpie?is and Jatigans type. Theobald's C. tigripes •var.fiisca 

 (Mon. Cul. V, p. 394) the male genitalia of which I have also examined, 

 includes the darkest forms. It is certainly not, -as I at 'first thought possible, a 

 distinct species. C. tigripes is iVidely distributed over Africa. 



8. C. theileri, Theo., Mon. Cul. Ill, p. 187 (1903). 



C. pettigreuH, Theo., Rec. Ind. Mus. IV, p. 15 (1910). 

 A species very easily recognised by means of the striped femora. The co-type 

 of C. pettigrcwi in the British Museum exactly resembles C. theileri. 

 Transvaal ; Madeira ; India. 



9. C. univittatus, Theo., Mon. Cul. II, p. 29 (1901). 



Heptaphlebomyia simplex, Theo., Mon. Cul. Ill, p. 337 (r9d3). 



Heptapldebomyia montforti, Ventrillon, Arch. Parasit. IX, p. 448 (1905). 

 ■ A rather obscure species, until the striped tibiae are noticed. Some specimens 

 recall G. duttoni, but they can always be distinguished by the unhanded proboscis 

 ■and kgs. The British Museum series of H. simplex consisted of 3 Q and 1 S 

 C. univittatus (including type Q of //. simplex) and one c? C- decens (labelled as 

 type of H. simplex, and figured in Mon. Cul. IV, p. 533). Thfe co-types of 

 H. montforti from Madagascar, which are in the British Museum collection, are 

 certainly also C. univittatus. I do not believe the species is separable genei'ically 

 from Culex. The whitish spot on the apex of the tibiae is not more conspicuous 

 in this species than in other members of the genus. 

 N. Nigeria; Angola ; S. Rhodesia ; Madagascar. 



10. C. pipiens, Linn., Syst. Nat. Ed. X, p. 602 (1758). 

 Included here as varieties are : 



i. C.J'g.tigans, Wied., Auss. Zweif. Ins. p. 10 (1828). The stem of the first 



fork-cell is a little longer than in C. pipiens. 



E. Africa ; common almost everywhere in other parts of the tropics. 



C. fatigans is said by Griinberg (Zool. Anz. xxix, 1905, p. 390) to 

 be, with Stegomyia fasciata, F., the commonest Culicine in Kamerun 

 and Togo. It seems as though some mistake must have been 

 made, as C. fatigans is unrepresented in any of the large collections 

 of mosquitos which have been received in England from West 

 Africa.* 

 ii. C. pallidocephala, Theo., First Rept. Welle. Lab. p. 73 (1904). The 



scales of the head are paler and the thorax is dark brown instead of 



reddish brown. The costal margin is darker. 

 Sudan ; British East Africa. 



• Since the above was written I have seen three specimens from Sokoto, N. Nigeria 

 {Dr. J. M. Dalzhl). 



