THYRIDIDAE OF AFRICA AND ITS ISLANDS in 



R a +R 3 +R t . Hind vving, colour and pattern as fore wing but without black marks. Sc+R x 

 and Rs approach but not joining. 



Genitalia <$ (PI. 36, fig. 197). Uncus simple. Gnathus with long median process. Valve 

 simple, basal part of costal margin of valve with spines. Basal process sclerotized. Juxta two 

 sclerotized lobes with long spines at apex, median plate without spines. Aedeagus with manica 

 strongly spined on one side. 



$. Wing, 13-13-5 mm. Colour and pattern as male. Labial palps with third segment 1/2 

 length of second, 2 X diameter of eye. Underside of wings browner than male. 



Genitalia $ (PI. 58, figs 354, 355). Anal papillae short. Neck of duct covered with minute 

 spines, with small sclerotized plate near ostium. Bursa with minute spines. 



Discussion. This species has a similar fore wing venation to inops but is generally 

 smaller and has a prominent black spot on the hind margin of the fore wing which is 

 not present in inops. The two species can be separated in the male by the shape of 

 the gnathus, which is long and slender in pellucida but short and covered in minute 

 spines in inops. The basal process is not hooked in pellucida as in inops and the 

 manica of the aedeagus of pellucida is covered with spines. The female genitalia of 

 pellucida and inops are very similar but the neck of the duct of pellucida is more 

 densely covered with spines than in inops. From E. Candida, E. pellucida can be 

 separated by the characters given on page no. The shape of the basal process of the 

 valves of the males from Tanzania and Gambia is different from the other specimens 

 and this may represent subspeciation. 



Distribution. Map 39. Gambia; Liberia; Cameroon; Gabon; Tanzania. 



Material examined. 



Holotype <$, Cameroon: Efulen (Weber), BM slide no. 10372, in CMP. 



Paratypes. Cameroon: 3 £, 1 $, Efulen, 1917-25 (Weber), two $ in CMP; 

 1 $, Batanga, xi.1910 (Good), in CMP; Gabon: i <$, Kangwe. 



Material not included in the type-series. Gambia: i $ (no other data) ; Liberia: 

 1 <J, Nimba, Grassfield, i.1968 (Forbes-Watson); Tanzania: i <$, Mukuya, Kigoma, 

 xii.1963, in NMK. 



The DAN 1ST A -Group 

 This contains the next four species, which are characterized by the fusion towards 

 their base of only two of the radial veins of the fore wing, R 3 + R t . This species- 

 group is rather more heterogeneous than the inops-group. It includes the species 

 E. radiata and E. vocata which have very distinct patterns. Whilst the latter is 

 known only from two specimens and its generic position may be clearer when the 

 female is known, there are more specimens of radiata which is much more difficult 

 to place in its correct generic position since it does not show any close affinities with 

 other species. The pattern of radiata is unusual, which makes it easily recog- 

 nized. The species E. danista has a similar pattern to R. werneburgalis Keferstein 

 from Madagascar, but it lacks the tarsal spines of this species. 



Key to the DANISTA -Group 



1 Fore and hind wings mostly white ........ 2 



- Fore and hind wings heavily patterned with brown ..... 3 



2 (1) Fore wing with dark costal margin, rest of wing white with narrow brown trans- 



verse fascia .......... xystica (p. 112) 



