]14 Mr. H. Eltringham's Monograph of the 



the 1^, the subapical band of the f.-w. is white, slightly sufFusec? 

 proxiiiially, with pale ochre yellow. The underside is typical. 



A. cephems 5 f- nigrescens, f. nov. 



This form represented in the Tring Museum has all the wings- 

 sepia, without the white subapical bar. In the h.-w. the ex- 

 ternal portion of the discal area is paler and is deeply invaded 

 on the nervules by the black of the marginal border, and be- 

 tween them by the dark ground-colour. The spots are as in the 

 typical ^ . On the underside the f.-w. is deep mauve, the costa^ 

 apex, and hind margin sage green. H.-w. pale sage green. 

 Spots and markings as in typical examples. (Described from a 

 Sierra Leone specimen.) 



A series of $ examples shows various intermediates- 

 between these different forms, often from the same locality. 

 Thus specimens from Fernan Vas R. (French Congo) 

 show all gradations from the typical $ to the iiheusaca 

 form, a $ from the same locality being of the usual color- 

 ation. I do not feel justified therefore in assigning any 

 particular $ to a distinctive form of ^. One is tempted 

 to regard these different forms of ^ as to some extent 

 seasonal, but the series here mentioned were all taken at 

 the same time, viz. in the month of January, which seems 

 to preclude this possibility. 



38. ACRAKA PETRAEA. PI. VIII, f. 13. PI. XVI, f. 4. 



Acraea petraea, Boisduval, Voy. Deleg., 2, p, 589 (1847); 

 Wallengren, Rhop. Caffr., p. 21 (1857) ; Hoppfer, Peters 

 Reise. Ins., p. 373, pi. 34, f. 1-4 (1862) ; Trimen, Rhop. 

 Af., Austr. p. 100 (1862); Oberthixr, Etud. d'Ent., 3, p. 26, 

 pi. 2, f. 4 (1878); Staudinger, Exot. Schmett, 1, p. 85, 

 ])1. .33 (1885); Trimen, S. Af. Butt., 1, p. 144 (1887); 

 (metani ), I.e., p. 145; Butler, Proc. Zool. Soc, p. 192 

 (1898); Aurivillius, Rhop. Aeth., p. 95 (1898); Fawceit 

 (metam.). Trans. Zool. Soc, p. 294, pi. 46, f. 1, 2, 3 (1901); 

 Marshall, Trans. Ent. Soc, p. 325(1902); Dixey & Longstaft", 

 Trans. Ent. Soc, p. 318, 328 (1907). 

 9 (dry season) = petrinn, Suffert, Iris, p. 25 (1904). 

 Natal; Transvaal; E. Griqualand ; German E. Africa 



(Dar-es-Salaam, Kilimandjaro, Tanganyika, Mikandani). 



f. taborana, Suffert, Iris, p. 26 (1904). 

 Localities as above. 



