THYRIDIUAE OF AFRICA AND ITS ISLANDS 169 



Paratypes. Gabon: i <$, Makokou, 500 m, Miss. Biologique, 7. v. 1962 (Minko), in 

 MNHN ; Democractic Republic of the Congo : i <$, Equateur, Flandria (Hulstaert), 

 x 935; x c?> Luluabourg, 25.iv.1951 {Fontaine), in MRAC. 



Opula monsterosa sp. n. 



(PI. 21, fig. II4; PI. 45, fig. 258; PI. 67, figS 429-431) 



a". Wing, 21-5-22 mm. Vertex pale brown, frons produced slightly between eyes. Antennae 

 minutely ciliate. Labial palps with third segment 1/3 length of second, upturned. Patagia 

 brown. Thorax paler brown. Hind tibia with outer spur of distal pair 2/3 length of inner 

 spur. Fore wing, pattern as in PI. 21, fig. 114, grey-brown with black spot at apex of cell. 

 Reticulate pattern of upperside overlaid with indistinct reddish brown pattern. Underside 

 paler. Hind wing with more distinct pattern of round spots, underside similar, colour as fore 

 wing. Terminal margin incised below apex. Sc+R t and Rs free. 



Genitalia <J (PI. 45, fig. 258). Uncus simple. Gnathus with prominent median process. 

 Valve simple. Juxta, two elongate lateral lobes. Manica covered with minute spines. 



9- Wing, 27-29 mm. Colour and pattern as male. 



Genitalia $ (PI. 67, figs 429-431). Anal papillae short. Ostium lightly sclerotized, then a 

 modified, sclerotized short length of duct. Bursa with elongate spiny signum. 



Discussion. The relatively large size and black spot on the fore wing make this 

 species easily recognized. This is one of the largest species in the genus, being similar 

 in size to 0. hebes, from which it can be separated by the black spot on the wing 

 (absent in 0. hebes). 0. monsterosa is similar in size, and to some extent pattern, 

 to Chrysotypus phoebus Viette from Madagascar but the two are otherwise very 

 distinct morphologically. 0. monsterosa differs from other species in the genus in 

 the shape of the signum which is longitudinal in monsterosa but transverse in the 

 other species. There is some variation in this character, however, in the other 

 species and in 0. perigrapha the signum is oblique. From 0. spilotata, monsterosa 

 can be separated by its size, by the broader valve in the male and the shape of 

 the signum in the female. The Ugandan specimen is darker than the Congo speci- 

 mens. 



Distribution. Map 63. Democratic Republic of the Congo; Uganda. 



Material examined. 



Holotype^, Democratic Republic of the Congo: {Jackson), 1926, BM slide no. 

 10617, in BMNH. 



Paratypes. Democratic Republic of the Congo: i <$, Uele, Paulis {Fontaine), 

 12.iii.1956, in MRAC; i<J, Uele, Paulis {Fontaine), 23.1.1957, in MRAC; 1 $, Sankuru, 

 Katako Kombe {Fontaine), 24.xi.1951; 1 $, Sankuru, Katako Kombe {Fontaine), 

 4.ii.i953, in MRAC; Uganda: i $, Fort Portal, Mpanga Forest {Carcasson), v. 1958; 

 1 (J, Toro, Bwamba {Archer), vi.1967. 



Opula chopardi (Viette) 



. : 120. 



1967 : 40, figs 



Distribution. Madagascar. Map 62. 



Rhodoneura chopardi Viette, 1954 : I2 °- 



Opula chopardi (Viette) Whalley, 1967 : 40, figs 17, 52, 72, 73 



