156 A. WATSON 



distal line of postmedial fascia highly lustrous ; some highly lustrous scales on vestige of prox- 

 imal line of antemedial fascia ; fringe brown. Under surface of both wings very pale greyish 

 buff with trace of grey postmedial fascia on fore wing (not corresponding in position with this 

 fascia on upper surface) and hind wing (position as for upper surface). 



Abdomen pale greyish buff dorsally, paler ventrally. 



6* genitalia (Text-figs. 249-25 1 ) : processes of tegumen heavily sclerotized ; medial part of 

 gnathus not dentate ; valve without basal process ; uncus short, evenly convex ; aedeagus 

 swollen proximally, slightly asymmetric ; eighth abdominal sternum distinctively shaped. 



$. Similar to male but with slightly concave outer margin to fore wing and differently shaped 

 costa (Plate 16, fig. 335). 



$ genitalia (Text-fig. 252) : posterior margin of ostial segment emarginate dorsally, concave 

 laterally ; ovipositor lobes robust, both pairs of apophyses short. 



Measurements. A.P.R. : $. 17 ; $. (No complete antenna.) Wing : $. no, 105- 

 120 mm. (8) ; $. 14-5, 14-0-15-0 mm. (2). 



Discussion. The shape of the fore wing costa and the outer margin of the hind 

 wing (see Plate) separates this species from serena and argyrobapta, both of which 

 are quite closely related to macnultyi. The short uncus, the non-dentate gnathus 

 and the distinctive eighth abdominal sternum characterize the male genitalia. 



Individual variation in the coloration of the upper surface of the wings has been 

 described above. 



Distribution (Map 7). Ranges from Nigeria to the Congo, with no apparent 

 geographic variation. 



Material examined. Type. Holotype^, Nigeria, Port Harcourt, 15.viii.1g57 

 (MacNulty) ; Drepanidae genitalia slide No. 1231 ; in the British Museum (Natural 

 History) . 



Paratypes : British Museum (Natural History). Nigeria : 2 o\ Port Harcourt, 

 11. v, 17.viii.1958 (MacNulty). Central African Republic : 2 <$, Boukoko, 

 13.xii.1959 (Real). Congo : 1 $, Kassai (Raymans). Institut d ' Enseignement et de 

 Recherches tropicales, Bondy. Central African Republic : 2 <$, Boukoko M'baiki, 

 14.xii.1949, 7.1L1959 (Real). Musee Royal de I'Afrique centrale, Tervuren. Congo : 

 1 $, Eale, vii.1936 (Ghesquiere) ; 1 $, Kibale, Mount Hoyo, 23.xii.1956 (Hecq). 



NIDARINAE subfam. n. 



Type-genus : Nidara Mabille, 1897. 



Description. q*> ?• Palp short, slender ; proboscis vestigial; gena large ; labrum broad 

 transversely ; antenna unipectinate, A.P.R. high. (See Text-fig. 253.) Outer margin of both 

 fore and hind wings entire ; fore wing not falcate. Retinaculum and short frenulum present in 

 male. Fore tibia without epiphysis. Mid and hind tibia without spurs. Genitalia : see 

 Nidara. 



Discussion. The subfamily Nidarinae has been erected for Nidara Mabille, a 

 Madagascan genus known only from the imago. It can be distinguished from all 

 other known genera of the two existing subfamilies, Drepaninae and Oretinae, by 

 the absence of an epiphysis on the fore tibia and the absence of spurs on either the 

 mid or hind tibia. Nidara possesses a vestigial proboscis, as in the Oretinae 



