150 D. S. FLETCHER 



Dichrostachys glomerulus (G. S. Cotterell), i <$. Niger: S. Damagarim, Bande, 

 16.ix.1920 (A. Buchunun), 1 <$. Central African Republic: Fort Crampel, 

 1 $. Sudan: Wau, 1 <$ (ZSBS, Munich). Togo: Misahohe, 1893 (E. Buumunn), 

 1 $. Nigeria: Massarawa Pr., Izom, Gbari, 5.VU.1921 (C. R. Walker), 1 £ (UM, 

 Oxford); Zaria, Samaru, 11.viii.1966 (/. Deeming), 2 $; ibidem, x. 1967, 1^,1$; 

 Zungeru, ii-iv. 1911 {Scott Macfie), 1 $, 2 $; Bodeggi, 19.ix.1910 (Scott Mucfie), 

 1 g\ Jos, vi. i960 (/. Boormun), 1 <$; Ibadan, 19. v. 1958 (H. J. Sutton), 1 <£; River 

 Benue, Abinsi, v, vii, 2 $ (all BMNH); Lagos, ix. 1910 (J. A. de Guye), 2 $ (UM, 

 Oxford); Agoue (Benin), 1894 (Abbe Menuger), 1 $; Olokemeji, v. 1908 (G. C. 

 Dudgeon), 1 <$; Akassa-Onitsha, R. Niger (Dr Cook), 1 $ (all BMNH). Cameroun: 

 Efulen, v-vi (H. L. Weber), 1 $, 2 $ (CM, Pittsburgh). Uganda: Entebbe, iii. 1961 

 (A r . Mitton), 1 c$\ 1 $ (NMK, Nairobi); ibidem, vii. 1961, 2 <J (NMR, Bulawayo). 



The VULPINA -Group 



Characterized in the male genitalia by the bifurcate fulcrum, each of the two 

 parallel parts being blade-like. Uncus short and tapered, base bulbous and 

 dorsally setose. Ventral plate of gnathus developed. Vesica without cornutus. 



The male hind tibia is not dilate, but encloses a compact tuft of fine hair-scales, 

 which can be extruded through a circular opening at about mid-tibia. The 

 capsule-like tuft is equal in length to the greatest width of the tibia; readily visible 

 in cleared and slide-mounted material only. 



In the female genitalia the lamella antevaginalis is weakly sclerotized and bilobate 

 just anterior of operculum; remainder of sterigma membranous. 



Key to Species 



1 Non-hyaline area of wings broad; hyaline area not extending distad beyond 



two-thirds of wing between veins M s and Cu lb . Apex of aedeagus smoothly 

 tapered ............ 2 



- Hyaline area of wings extending to or beyond five-sixths of wing between 



veins M 3 and Cu lb . Apex of aedeagus with small, thorn-like projection 3 



2 (r) Discal spot ovate with pale hyaline centre; remainder of hyaline area striate 



with brownish orange. Twin blades of fulcrum with rounded apices saburra (p. 155) 



- Very large, round discal spot uniformly brownish orange; spot of similar size 



and colour at one-third posterior margin of each wing. Twin blades of 

 fulcrum with truncate and serrate apical margins . . . dialitha (p. 154) 



3 (r) Valve of even width to truncate apex; apex of ventral margin abruptly curved 



through 90 degrees. Subterminal fascia unbroken between veins M 3 

 and Cw lb . Discal spot on fore wing usually as broad as abdomen 



bastelbergeri (p. 153) 



- Valve tapered apicad; ventral margin evenly curved towards apex of dorsal 



margin. Subterminal fascia broken by intrusion of hyaline area between 

 veins M 3 and Cu lb . Discal spot on fore wing minute ... 4 



4 (3) Blades of fulcrum very slightly asymmetrical, finely tapered and both extending 



beyond tip of aedeagus. Non-hyaline terminal area of wings predominantly 

 reddish golden to greyish red ...... vulpina (p. 151) 



- Blades of fulcrum markedly asymmetrical, tapered but not finely so; shorter 



blade extending to tip of aedeagus, but not beyond. Non-hyaline terminal 



area of wings predominantly brownish grey . . . longidens (p. 152) 



