African Species of the Genus Acraca. 241 



A, terpsichore terpsichore. 



(^ . Expanse 40-50 mm. Ground-colour reddish orange to 

 deep golden yellow. F.-w. black along costa, narrow at base 

 and just before apex, and rather wider between. Apex with a 

 fairly broad black tip (3-5 mm.) becoming narrower along hind 

 margin. This marginal black is wider in areas 2 and 3 than 

 elsewhere. In typical examples it is so extended inwardly that 

 it joins a large wedge-shaped black mark emanating from the 

 costal black at about the end of cell, and thus cuts off a subapical 

 patch of the ground-colour. When this patch is not completely 

 cut off, but is joined to the general ground-colour across area 3, 

 the example may be said to belong to the form rougeti. Upon 

 the marginal black is a series of internervular submarginal spots 

 of the ground-colour varying much in size and sometimes dis- 

 appearing towards the apex. There is usually a spot in the cell, 

 close against the subcostal nervure and above origin of nervule 2. 

 This spot maybe a minute dot, an elongated streak, or a rounded 

 mark some 2 mm. in diameter. There is sometimes a very 

 slight black basal suffusion. 



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

 marginal border from 2 to 3 mm. wide and bearing internervular 

 spots of the ground-colour, these being very variable in size and 

 sometimes reaching the margin. The inner outline of this 

 border may be perfectly regular and parallel to the outer 

 margin, or it may be somewhat angulated, the border being 

 rather wider at apex and anal angle. Black spots corresponding 

 to those on underside but usually only faintly indicated, with 

 the exception of the spot on discocellulars, which is almost 

 always visible as a short black line in the middle of the wing, 

 and forms a very characteristic feature. 



Underside f.-w, from base to central portion like upperside 

 but paler, darkest at base and along subcostal. Costa greyish 

 ochreous. The subapical and apical areas may be black as on 

 upperside, though duller, and enclosing the subapical patch, 

 which on the underside is pale ochreous, or the upper distal 

 portion of the wing may be ochre yellow from the discocellular 

 mark to the margin, broken only by the black ends of the 

 nervules. Along the hind margin in 3, 2, ll:i, and la, either 

 the black or the yellow may predominate. In the former case 

 internerviilar yellow marks remain, in the latter the black 

 powdering on the nervules may be either straight or may widen 

 a short distance from the margin into arrow-head markings. 

 There is a black dot at base of costa and a narrow black line 

 round hind margin. 

 TRANS. ENT. SOC. I.OND. 1912. — P.\UT I (JULV; R 



