African Si^ccies of the Genus Acraca. 45 



115, pi. 10, f. 10, 11 (1885-7); Aurivillius, Eliop. Aetli. 

 p. 90 (1898); Aurivillius, Voeltzkow Exp., p. 315 (1909). 

 = corona, Staudinger, Exot. Schmett, 1, p. 83, pi. 33 (1885). 



German E. Africa (Dar-es-Salaam, Lindi, Bondu, Bagamoyo, 

 Saadani, Mafia I.) ; British E. Africa (Kabai, Zanzibar, 

 Witu); Rhodesia (Chirinda) : Zuiatland. 



(J. Expanse 55-70 mm. F.-w. thinly scaled. Base and 

 coS'ta black, area lb sometimes yellowish. A short black basal 

 streak in lb. From base to end of cell, base of area 2, two-thirds 

 of lb, and a slightly less extent of la, bright red. The red area 

 bounded bj^ an irregular discal band of black from subcostal to 

 hind angle, and darkest on end of cell. A rather broad sinuous 

 transverse black mark in cell near end. Areas 4, 5, and 6, from 

 transverse band to middle of discal area, red, followed by a slight 

 dusting of blackish scales. All the f.-w. black markings may 

 be very faint, the spot on discocellular being the least liable to 

 obsolescence. Remainder of f.-w. semitransparent, scales being 

 slightly reduced, scattered, and sometimes replaced by bifid 

 hairs. H.-w. red, yellowish at inner margin. A hind marginal 

 black border bearing a variable number of internervular spots of 

 the ground-colour. An irregular discal band of black sometimes 

 enclosing spots of the ground-colour. Base black, with a sub- 

 basal spot in 7, one in cell, and one in la. 



Underside, f.-w. scaled oidy at base and costa. H.-w. as 

 on upperside, but scaled only at base, margins, and discal band. 

 Costal and inner marginal scales dull ochreous, black spots as on 

 upperside. Hind margin as on upperside but with seven large 

 rounded dull ochreous spots. Thorax black spotted with 

 yellowish beneath, and with two to four whitish spots above. 

 Abdomen black above, paler below, and laterally and ventrally 

 spotted with yellowish. Claws unequal. 



5 . Expanse about 84 mm. Markings similar to those of ^ but 

 the red colour everywhere replaced by white. In f.-w. the cell 

 spot may coalesce with discal band, or may enclose a small white 

 spot. Abdomen white spotted. 



Acraca satis is a remarkably distinct species not only in 

 the character of the markings but also in the structure of 

 the genitalia. A very peculiar modification of the parts 

 has taken place. The true uncus and claspers have 

 become much reduced, whilst the dorsal and ventral 

 abdominal plates have become greatly modified, so as to 

 resemble false uncus and claspers respectively. 



