THYRIDIDAE OF AFRICA AND ITS ISLANDS 69 



Genitalia $ (PI. 30, fig. 160). Uncus bifid with two finger-like lateral processes (socii ?), 

 apex of gnathus with prominent median triangular-shaped process with peg-like teeth. Valve 

 with prominent apical spur, basal region of valve enlarged by membranous fold covered with 

 hairs. Juxta, two flattened lateral arms, lightly sclerotized and covered with hair. Aedeagus 

 with spiny vesica. Prominent pair of coremata. Posterior margin of Vlllth sternite concave. 



$. Wing, 13*5-14 mm. Darker brown coloured than male. Labial palps with third 

 segment 1/2 length of second. Pattern as male. 



Genitalia ? (PI. 52, figs 301, 302). Anal papillae short, duct of bursa convolute. Broad 

 V-shaped ostium each side of the "V" covered with hairs. No signum. 



Discussion. There is sexual dimorphism in the labial palps and size in this 

 species. Specimens vary in intensity of the wing colour and to some extent in 

 pattern. Some variation in the length of the apical process on the valve of the male 

 occurs but at present this has not been correlated with any other feature which 

 might suggest subspeciation. Nevertheless the variation in specimens from a 

 wide range of localities suggests that, when a longer series are examined, more 

 evidence of subspeciation will be found. Externally this species resembles 5. 

 minutula Saalm tiller from Madagascar but the genitalia are distinct. 



Distribution. Map 30. Sierra Leone; Liberia; Ivory Coast; Ghana; Nigeria; 

 Cameroon; Rio Muni; Gabon; Democratic Republic of the Congo; Uganda; Angola. 



Material examined. 



LECTOTYPE $, (rothi) here designated, Nigeria: Warri, v.[i8]o.7 (Roth), BM slide 

 no. 9107, in BMNH. Holotype <$ (clathratipennis) , Rio Muni: Benitogebiet, 

 15-30. vi. 1906 (Tessmann), BM slide no. 9509, in ZMB. 



Sierra Leone: i $, 4 $, Moyambe, vi.1902, iv-v.1903 (Cator) ; 1 <$, Njala, ix.1930 

 (Har greaves); 1 $, 1 $ (Clements), iii-iv.1895 (one specimen in USNM); 1 <$, Hill 

 Station, xii.1933 (Frere); 1 $, Sierra Leone (no other data); 3 <$, 1 $, Bo (Revell), 

 iii-iv.1967; 1 (J, 2 $, Bo (Revell), i-iii.1969; i<$, Bo (Revell), x.1968; 2$, 1 $, Bo (Revell), 

 xi-xii.1967; Liberia: 2 d, 1 ?, Nimba, Grassfield, ii-iii.1968 (Forbes-Watson), in 

 NMK; 1 $, Nimba, Grassfield, vii-viii.1967 (Forbes-Watson); Ivory Coast: i g, 

 Agboville, vi.1915 (Melon); 1 $ (Cremer), 1919; Ghana: 2 $, Coomassie [Kumasi] 

 (Whiteside) ; 1 <$, Aprade, viii.1968, ex Terminalia ivoriensis; 3 $, Kumasi (Sanders); 

 Nigeria: i <$, Vivet, v. 1906 (Dudgeon); 1 $, Niger, Oguta (Ansorge), xi.1907; 1 <$, 

 Niger, Agberi (Ansorge), vii.1907; 1 <$, Nigeria (no other data); 1 $, Warri, v. 1897 

 (Roth) (paralectotype) ; 1 $, Old Calabar (Crompton) ; Cameroon : 27^, Efulen (Weber) 

 (various years), in CMP; 4^, 2 $, Lolodorf (Good), in CMP; 1 J, Lolodorf (Conradt), 

 1894-95; 3 $ (Schwab), xi.; 3 <J, 1 $, Johann Albrechts Hohe (Conradt), 1896; 1 <$, 

 Batouri Distr. (Mer field), vi.-vii.1935; 1^,1$, Bitje, Ja River, 2000 ft (Bates), vii. 

 1909; 1 3, Yabassi Distr. [French Cameroon], xii.1937 (Merfield); 1 <$, Lomie, C.I., 

 ix.1962 (Oxford Univ. Exp.), in NMR; Rio Muni: i <$ (type, clathratipennis), in 

 ZMB; Gabon: i <$, Belinga, 600 m, Camp Centrale, iii.1962 (Bernardi); in MNHN; 

 1 (J, He de Lambirini, xii. 1916-1.1917; 2 <J, Fernan Vaz, Lake Asebbe (Ansorge), 

 ii.1908; 8 (J, 2 $, Kangwe, Ogove River (Good), in CMP; 3 <J, 1 $, Kangwe, in CMP; 

 Democratic Republic of the Congo: 1 <J, 1 $, Sankuru, Katako-Kombe, xi.1952, 

 i.1953 (Fontaine), in MRAC; 1 (J, Itoko a Gombe, 1921 (Verlatne), in MRAC; 1 <$, 

 Bumba (Waelbroeck), x.1905, in MRAC; 1 <$, Kindu (Burgeon), xi.1913, in MRAC; 



