African Si^xus of the Gein's Acraca. 151 



minute. The li.-w. lias a slight bai^al Ijlack suffusion and a 

 clearly defined marginal Lcu'der of black arches. Tlie discal and 

 basal spots are as in other forms of acrita but there is no spot in 

 3 and 5. The underside is paler and duller. The discal area of 

 li.-w. is devoid of red splashes and the internervular spots of the 

 margin are ochreous. 



The 5 resembles the f^ but the ground-colour of the f.-w. 

 has a brownish tinge and the spots are larger, especially the 

 first of the f.-w. discal row. But for this discal row of spots, 

 and the marginal spots of h.-\v. underside which are ochreous 

 instead of whitish, this 5 closely resembles certain intermediate 

 9 5 of (icriUi p\(dorina. 



A. acriia manca. f. liiidica. 



^ . Expanse 58-64 mm. The apical black about .5 mm. wide. 

 From middle of wing to the inner edge of the apical black the 

 ground-colour is rich ochreous the basal area being of the usual 

 flame orange colour. The usual spots are jnresent but small, but 

 there are no mihapicnl spots as in the typical manca form. In 

 the h.-w. the sjwts are as usual but I have seen no example of 

 either sex having a spot in area 3. The marginal border is 

 formed of a series of confluent black rings enclosing spots of the 

 ground-colour. 



$ . Dry season. Resembles (^ but rather duller, the ground- 

 colour having a tendency to rose colour. 



5 . Wet season. Sepia grey with a white subapical patch, 

 f.-w. apical black, all spots, and h.-w. marginal border rather 

 more heavily marked than in dry season form. 



The occurrence of this apparent subspecies of acrita with 

 its two very different forms adds greatly to the complica- 

 tion and difficulty of the subject. My reason for 

 separating them from the other forms is based on the 

 structure of the dorsal abdominal plate in the ^ and that 

 of the genital plate of the $. In the former the central 

 process is very long and Ungulate, and the latter is a 

 thick cylindrical chitinous structure very different from 

 the corresponding organ in other forms. These structures 

 are constant and similar both in the nKOica form with its 

 subapical spots, and in the lindica form in which these 

 spots are absent. I have used the name lindica hecciuse the 

 male described agrees with that so named by Strand (/. c). 

 That author's example was taken near Lindi, but all the 

 other examples I have seen have been found in tlie more 

 central parts of German E. Africa. 



