THYRIDIDAE OF AFRICA AND ITS ISLANDS 133 



The lobate opening of the duct in the female gangaba is similar to H. striatalis 

 Swinhoe. The males of these two species also have in common the spiny basal 

 processes on the valve but the shapes are different. Records of R. bastialis in 

 Africa (e.g. Dalle Torre, 1914 : 20) almost certainly refer to the new species described 

 here. The highly modified juxta separates gangaba from the other species in the 

 genus. 



Distribution. Map 55. Senegal; Sierra Leone; Ivory Coast; Ghana; Nigeria; 

 Cameroon; Uganda; Kenya; Tanzania; Rhodesia; Angola; South Africa. 



Material examined. 



Holotype $, South Africa: Natal, Karkloof, 7.ii.[i8]97 (Marshall), BM slide no. 

 10271, inBMNH. 



Paratypes. South Africa: 2 o*» 1. 9, Natal, Durban, xi-xii.1954 (Dickson), one 

 cJ, one 9 in TMP; 1 9» Nkandhla Forest, 22.1.1916 (Janse), in TMP; 1 9. Karkloof, 

 Natal, 18.1.1917 (Janse), in TMP; 2 <$, Port St John, Pondoland, vii.1923 (Turner); 

 1 9. Kowyn's Pass, Pilgrims Rest Distr., 22. ii. 1962 (Vari & Leleup), in TMP; 1 9- 

 Woodbush, Transvaal, ix.1960 (Vari & van Son), in TMP; 1 (J, 1 9. Woodbush, 

 1670 m, i.1925 (Janse), in TMP; 1 9- Natal, Durban, i.1902 (Leigh); 1 <$, Impetyeni 

 Forest, Natal (Swinney), i.1921, in TMP; 1 <J, Mariepskop, Pilgrims Rest Distr., 

 23-26.il. 1962 (Vari & Leleup), in TMP; 2 9. Mariepskop, 15-24. iii. 1965 (Potgieter 

 & van Son), one 9 in TMP; Rhodesia: i $, Bulawayo, 17.xii.1924 (Stevenson); 

 1 9, Vumba Mts, Umtali, 1953 (Pinhey), in NMK ; 1 9, Salisbury Expt. Station, Light 

 trap, i.1965, in NMR. 



Material not included in type-series. Senegal: i 9. Sedhiou, 1917 (Castell); 

 Sierra Leone: i 9, Port Lokko, v.1912 (Simpson); Ivory Coast: 4 9, Bingerville, 

 viii.1915 (Melou) ; Ghana: 2 9. Ashanti (Houston) ; 1 9, Kumasi, ii (Sanders) ; Nigeria: 

 1 9. Lagos, Oshodi, 1955; Cameroon: i $, 1 9, Efulen (Weber), in CMP; Uganda: 



1 $, Entebbe, vi.1961, in NMR; 1 9. Bwamba, Toro (Mitton), ix.1961; Kenya: 



2 9, Nderema, vi.1936 (van Son), one 9. in TMP; 1 $, Mombasa (Doherty) ; Tanzania: 

 1 9i Amani, Malaria Res. Institute (Pringle), v. 1964; 1 <$, Amani, vii.1966 (Mackay & 

 Watson), in NMK; Angola: i 9. Fazenda, Congulu, Amboim Distr., 700-800 m, 

 12-16.iv.1934. 



CORNUTERUS gen. n. 



Type-species, Siculodes nigropunctula Pagenstecher. 



The species described as Hypolamprus trivius Whalley from Madagascar (1967 : 36) 

 is here transferred to this genus where it is closely allied to C. paratrivius. Both 

 these species are known only from the female but both have the typical wing shape 

 and bursal spines of the genus Comuterus. C. palairantus is known only from one 

 damaged specimen and is rather peculiar. It is only tentatively placed in this 

 genus and may need a new genus when more specimens are examined. Tarsal 

 spines are present in palairantus but are absent in other species of the genus. The 

 genus has certain features of the genus Microbelia Warren in which the female has a 

 large sclerotized cornutus but a more detailed comparison will have to await a 

 revision of the genus Microbelia. The genus Comuterus is found in Africa and 

 Madagascar. 



