THYRIDIDAE OF AFRICA AND ITS ISLANDS 159 



Crete, Sud., iii.1963 (Bernardi), one <$ in MNHN; Democratic Republic of the 

 Congo: i $, Eala, ii.ig36 (Ghisquiire) , in MRAC; 1 $, Sankuru, Katako Kombe, 

 xii.1952 (Fontaine), in MRAC. 



Sijua furcatula (Pagenstecher) comb. n. 

 (PI. 20, fig. 104; PI. 44, fig. 247; PI. 65, fig. 414) 



Siculodes furcatula Pagenstecher, 1 892 : 7 1 . 

 [Rhodoneura bastialis sensu Hampson, 1897 : 624; nee Walker.] 

 [Rhodoneura bastialis sensu Dalle Torre, 1914 : 20; nee Walker.] 

 Rhodoneuva furcatula (Pagenstecher) Gaede, 1917 : 368. 

 [Rhodoneura bastialis sensu Gaede, 1929 : 494; nee Walker.] 



<J. Wing, 11-12 mm. Vertex white, frons white, flattened between eyes. Labial palps 

 with third segment 1/2 length of second, upturned, reaching vertex. Patagia and prothorax 

 dark brown, rest of thorax whitish. Hind tibia with outer spur of distal pair less than 1/2 

 length of inner; inner spur of distal pair almost as long as 1st hind tarsal segment. Inner spur 

 of proximal pair more slender than distal and longer than corresponding distal spur. Fore 

 wing, pattern as in PI. 20, fig. 104, yellowish white with grey reticulations. Costal margin 

 dark, continuous with patagia and dark prothoracic line. Apex of wing white with black spots 

 between veins, this white area strongly bordered on inner margin by grey. Grey median 

 fascia, narrow at centre of wing. Underside, similar to upper, slight reddish tinge over wing. 

 Strongly iridescent scales along central costal margin under fore wing. Hind wing, similar 

 colour to fore wing, some black marks on hind wing margin. Underside similar to upperside. 

 Sc+Ri approaches Rs but does not join. 



Genitalia <£ (PI. 44, fig. 247). Gnathus lightly sclerotized. Small, strongly sclerotized, 

 tooth on median basal process of valve. Last abdominal segment with posterior margin of 

 sternum strongly concave. Aedeagus with manica lightly spined. No cornuti. 



$. Wing, 1 1-5-12-5 mm. Similar to male but third segment of labial palp 1/2 length of 

 second. 



Genitalia $ (PL 65, fig. 414). Duct long, slender and covered with minute sclerotized plates. 

 Bursa minutely spined, no signum. 



Discussion. This species has generally been regarded as conspecific with R. 

 bastialis Walker. However, apart from some external differences, bastialis has a 

 median basal process covered in short teeth and there are numerous cornuti in the 

 aedeagus. The female of bastialis also has two strong signa in the bursa. The 

 holotype of S. furcatula Pag., which was seen by Gaede in 1917, has been lost (H. 

 Hannemann, personal communication). I am therefore designating for this species 

 a neotype which agrees with the description and figure of Pagenstecher. This 

 specimen, although a Carnegie Museum specimen, is deposited in the Zoological 

 Museum, Berlin where Pagenstecher's type was originally deposited. This is possible 

 because of the generous permission of the Carnegie Museum Authorities. 



Distribution. Map 67. Ivory Coast; Nigeria; Cameroon. 



Material examined. 



Holotype $, lost. NEOTYPE $, here designated, Cameroon: Efulen, 14.lv. 1923 

 (Weber), BM slide no. 10276, in ZMB. 



Ivory Coast: i <J, ForSt du Banco, x.1963 (Piart & Griveaud), in MNHN; 

 Nigeria: i $, Warri, ix.1897 (Roth); Cameroon: i <$, Bitje, Ja River, 2000 ft, 

 x-xi.1912; 11 <J, 1 $, Efulen, 1912-23 (Weber), nine<3\ one $ in CMP; 1 $ (Schwab). 



