A REVISION OF THE ETHIOPIAN DREPANIDAE (LEPIDOPTER A) 133 



Discussion. The presence of paired elongate processes (possibly representing 

 the gnathus) ventral to the uncus in the male, a highly modified eighth abdominal 

 segment in the female, together with similarities in the coloration and colour-pattern, 

 suggest that Isospidia is probably most closely allied to Uranometra Bryk. The 

 colour-pattern, and to some extent the coloration, suggest affinities with Spidia 

 Butler, though neither the male nor female genitalia indicate a close relationship. 



Particularly striking individual variation in the coloration is present in angusti- 

 pennis, and in both known species of the genus the areole in the fore wing may be 

 either present or absent. 



Notable morphological characters in the genitalia include the highly modified 

 eighth segment in the female, and in the male the slender acuminate processes lying 

 beneath the uncus which are possibly homologous with the similarly placed processes 

 in the genitalia of Uranometra Bryk. 



One species, angustipennis, is represented by two subspecies. 



The species brunneola has been transferred to this genus from Uranometra Bryk. 



Distribution (Map 6). Sierra Leone, Ivory Coast, Ghana, Cameroun, 

 Congo, Central African Republic and Uganda ; almost exclusively from rain- 

 forest or montane forest regions. 



Isospidia angustipennis (Warren) comb. n. 

 (Text-figs. 219-224 ; PI. 14, figs. 326-329 ; Map 6) 



Or eta angustipennis Warren, 1904 : 461. 



Oreta angustipennis Warren ; Gaede in Seitz, 1927 b : 288. [Fair fig.] 



Oreta angustipennis Warren ; Gaede, 1931 : 43. 



Oreta (?) hylaeina Aurivillius, 1925 : 1290. 



Oreta glaucinoe Hampson, 1914 : 104. syn. n. 



Oreta glaucinoe Hampson ; Gaede, 1931 : 44. 



Description. <J, $. Palp, front of head and narrow band bordering posterior margin of eyes 

 brownish pink (holotype), brownish scarlet or scarlet, vertex of head yellowish brown ; upper 

 surface of base of antennal shaft as for front of head, remainder pale buff. 



Dorsal surface of thorax buff (holotype), pale yellow or yellow ; ventral surface very pale buff. 

 Front surface of whole of fore leg pink (holotype) or scarlet ; front of mid and hind legs pink and 

 buff ; remaining surfaces of legs very pale buff. 



Ground-colour of upper surface of wings yellow, pale yellow (holotype), pale yellowish brown, 

 pink, brown, or grey variously speckled with brown (see account of individual variation below). 

 Colour-pattern as in Plate 14, figs. 326-329. Fore wing with conspicuous dark brown (holotype) 

 or black discocellular spot and trace of posterior cell-spot ; well-marked, oblique, variously 

 coloured postmedial fascia (pale brown bordered distally with yellow in holotype), extending 

 from near apex to one-half anal margin or to a point nearer to base than tornus ; dark dash on 

 costa near apex ; dark patch on anal margin of both wings in holotype of Ugandan subspecies 

 and in seven other specimens of the species, this patch usually associated with broad dark band 

 extending along proximal side of postmedial fascia from cell to anal margin ; fringe yellow at 

 apex of wing, then brown to about mid-point of outer margin, remainder yellow or buff. Ante- 

 medial fascia of upper surface of hind wing same colour as, and continuous with, postmedial fascia 

 of fore wing. Ground-colour of under surface of fore wing pale yellow (holotype), lemon-yellow, 

 dull pink or yellowish grey, but usually (including holotype) more brownish proximal to post- 

 medial fascia. 



