African Species of the Gcnns Acraca. 185 



Sudan (Bahr-el-Seraf), "V. Nyanza." 



1^ Expanse 50-56 mm. Wings rich ochre yellow and somewhat 

 more rounded than in other males of the raldarena gToniy. F.-w. 

 slightly darkened at base. Apex narrowly black continiied as a 

 narrow hind-marginal line. Black spots as follows : — One in cell 

 over origin of nervule 2. A double spot on discocellnlars. Beyond 

 cell an oblique band of four black spots in a straight line at right 

 angles to costa followed by a spot in 3 rather more distal and beneath 

 this a subniarginal spot in 2 and in lb. A spot in 2 beneath origin 

 of nervule 3 and beneath it a spot in lb. A subbasal spot in the 

 same area. H.-w. slightly blackened at base and having a black 

 hind- marginal border about 2 mm. wide bearing indications 

 of paler internervular marks ; its inner edge slightly arched 

 between the nervules. Black spots corresponding to those on 

 underside but rather faintly indicated towards inner margin. 

 Fringes white. 



Underside. F.-w. as on uppersidc but rather paler and 

 having two spots on costa near base. 



H.-w. as on upperside but without basal black and the 

 hind-marginal border bearing white internervular spots. Black 

 spots as follows : — One in 7 just beyond origin of nervule 7. 

 One in 6 much nearer margin. One near base of area 4. 

 Beneath it but nearer margin a spot in 3. One near base of 2. 

 Beneath it a spot in Ic, followed by one in lb rather nearer 

 base, and a dot in la. A spot in 9, one in 8, a subbasal in 7, 

 two in cell, one in discocellulars, a basal and a subbasal in Ic, 

 lb, and la. 



Head black with a pale mark between the eyes, and two 

 yellowish tufts on collar. Thorax black with reddish hairs. 

 Abdomen black above with yellowish lateral spots, except 

 last three or four segments, which are yellowish. Claws 

 unequal. 



$ unknown. 



An example in the National Collection agrees very closely 

 with the type, differing only in the following points : — F.-w. 

 The submarginal spots are absent in 2 and lb, the first or costal 

 spot of the discal row is very minute, and there is hardly any 

 basal black. H.-w. There is a small discal spot in area 5. 

 Underside. H.-w. the marginal border is formed of much 

 narrower black arches on a tine marginal line, thus enclosing 

 larger whitish spots. 



For the present I must keep A. ■marnois separate. 

 Aurivillius regards it as a lonu of A. imccwi. If, however. 



