African Species of the Genus Acraca. 29 



Qi) F.-w. without discal subapical spots periphanes f. acritoides (140) 



F.-w. with discal subapical spots ..... (/') 



(T) F.-w. with black apical patch ..... (j') 



F.-w. without black apical patch ..... (I/) 



(/) H.-w. margin naiTowly black, with spots of ground-colour 



periphanes periphanes (1 39) 



H.-w. margin broadly black without spots of ground-colour 



pieriphanes f. melaina, (139) 



{k') H.-w. margin narrowly black with spots of ground-colour 



periphanes f. heni (139) 



H.-w. margin liroadly black without spots of ground-colour 



periphanes f. nmida (140) 



(V) F.-w. with discal subapical spots (in) 



F.-w. without discal subapical spots .... (n,') 



(m') F.-w without black apical patch . acrifa manca (part) (144) 



F.-w. with black apical patch . . . lualabae (155) 



(n') Apical black 9-10 mm. deep. F.-w. spots, especially the outer 



spot in area lb, very small or absent . ehaeribnla * (153) 



Apical black patch very variable but at most not so deep as in 



the above. Outer spot in f.-w. lb well developed . (o') 



(o') Spots in f.-w. cell, on discocellular, and in area 2 are so large as 



to be almost or quite confluent . . acrita hellona (144) 



These spots not so large (p') 



{p') F.-w. with a white or whitish sul)apical band acrita nmhigua (1 43) 



F.-w. without such band ...... ((/) 



{q) Central process of last dorsal abdominal plate short 



acrita littoralis (144) 



Central process of last dorsal abdominal plate long 



acrita acrita f (143) 



acrita manca (part) (144) 



acrita hella (144) 



(/)') Genital plate hi thefurm of a sJuirt cliitiiwns cylinder 



acrita manca (144) 



Genitcd plate broad, carinate, and bijid . acrita ambigua (143) 



acrita littoralis (144) 



acrita acrita (143) 

 VII. 



F.-w. with hind marginal spots at least in lb and 2 . . {a) 



* Owing to the variability of acrita it is not possible to give 

 absolutely constant characters of difierence between it and this 

 species. _ Occasionally some examples of ((c/'iYrt have no spots in f.-w. 

 lb, but in these the apical black is only about 5 mm. deep. 



t It is not possible to completely separate the forms of A. acrita 

 on merely outward characteristics, or indeed in any other manner, 

 with absolute certainty. See under A. acrita in descriptive portion. 



