THYRIDIDAE OF AFRICA AND ITS ISLANDS 163 



Ko Prov., N. Nigeria, viii-ix.1913 (Cator); 1 £, U.C. Ibadan, v. 1958 (Sutton); 1 $, 

 Ikom, iii.1930; Cameroon: 3 $, 3 $, Bitje, Ja River, 2000 ft, ix-xi.1912; 1 <$, 1 $, 

 Bitje, Ja River, 2000 ft, dry season, vi-vii.1909 (Bates) ; 1 <$, Bitje, Ja River, x., wet 

 season (Bates); 1 $, Bitje, 3°N, i2°E., wet season, 1926 (Bates); Democratic 

 Republic of the Congo: i $, Bupoto, Upper Congo, vi.1901 (Smith), 1 $, no locality 

 data. 



Sijua canitia sp. n. 

 (PL 20, fig. 107; PI. 44, fig. 251; PI. 66, figs 420, 421) 



(J. Wing, 9-9*5 mm. Vertex grey with white scales. Frons mostly white. Labial palps 

 long, 2 X diameter of eye, upturned, reaching vertex, third segment 1/2 length of second. Patagia 

 white, rest of thorax grey-white. Hind tibia with inner spur of proximal pair long, reaching 

 almost to tip of longest distal spur. Fore wing, pattern as in PI. 20, fig. 107, grey with black 

 spot at apex of cell and a small creamy white area subapically. Indistinct darker transverse 

 fascia. Underside strongly patterned with white marks terminally between 1A and M 3 and 

 M 3 , M t and M v Black and silver iridescent scales in cell. White patch stretching from apex 

 towards posterior median area, reaching backwards to M t . Hind wing, more patterned than 

 fore wing with ante- and post-median light-coloured fascia. Prominent black spot in cell. 

 Hind wing incised below apex. Sc+R 1 and Rs free. 



Genitalia <J (PI. 44, fig. 251). Uncus simple. Gnathus weakly sclerotized with small 

 median projection. Valve with sclerotized basal process with hairy pad behind process towards 

 mid-line. Juxta two, simple, rounded lobes. Saccus rather elongate. Valve narrowing in 

 terminal half. Aedeagus with sclerotized rod on one side, vesica strongly toothed. 



$. Wing, 9-8 mm. Pattern as in male, slightly darker grey-brown than male. 



Genitalia $ (PI. 66, figs 420, 421). Anal papillae short. Ostium lightly sclerotized and 

 spined, duct with narrow and short sclerotized portion, rest of duct long and slender. Bursa 

 without signum. 



Discussion. The pattern and wing shape of this species are rather similar to C. 

 nigropanctulus Pag. but the genitalia are quite distinct. The male has the "Y"- 

 shaped sclerite on the tergum of the IXth segment characteristic of the genus Sijua 

 but the wing shape is atypical. The female lacks the spines in the bursa found in the 

 other species of the genus. I am therefore placing this species only tentatively in 

 this genus. 



Distribution. Map 67. Ivory Coast; Cameroon; Gabon; Democratic Republic 

 of the Congo. 



Material examined. 



Holotype <$, Cameroon: Efulen, 19.iii.1914 (Weber), BM slide no. 10363, in CMP. 



Paratypes. Ivory Coast : 1 $, Bingerville, ix.1915 (Melon) ; Gabon : 1 <$, Kangwe ; 

 Democratic Republic of the Congo: i <$, Bolobo-Eala, 1921 (Verlaine), in MRAC 

 (this specimen lacks the abdomen) . 



OPULA Walker 



Opula Walker, 1869 : 371. Type-species, O. imphtalis Walker, by monotypy. 

 Opula Walker; Dalle Torre, 191 4 : 17. 

 Opula Walker; Whalley, 1964a : 123. 

 Opula Walker; Whalley, 1967 : 39. 

 [Rhodoneura sensu auct., nee Guenee.] 



