58 Dr. A. G. Butler on the Old- World 



the costa and outer margin of the primaries above, this 

 border not reaching the external angle in the females ; the 

 tinder surface of the dry-season form often largely suffused 

 with rose-reddish or flesh-colour. 



1 . Terias pulchella. 

 Xanthidia pulchella, Boisduval, Faun. Madag. p. 20, pi. ii. fig. 7 (1833). 



Mauritius and Madagascar. 



The dry-season form has the apex of the primaries and 

 the secondaries suffused with rose-reddish on the under 

 surface. The species is represented in the Museum by 

 eighteen examples. 



We have in the Museum a single male of a species from 

 Fwambo, Tanganyika, which (excepting in its much more 

 rounded wings) bears a curious resemblance to T. pulchella 

 it is, however, destitute of markings on the under surface. 

 I thought at one time that it might possibly be a very 

 aberrant example of T 7 . regularis, but it looks so utterly out 

 of place with that species that I feel convinced it will prove 

 to be a new thing ; nevertheless I hesitate to name it until 

 we receive further evidence. 



2. Terias brigitta. 



Papilio brigitta, Cramer, Pap. Exot. iv. pi. cccxxxi. B, C (1782). 

 Terias zoe, Hopffer, Ber. Verb. Ak. Berl. 1855, p. 640 ; Peters 's Reise, 



Zool. v. p. 369, pi. xxiii. figs. 10, 11 ^1862). 

 Terias candace, Felder, Reise der Nov., Lep. ii. p. 213 (1865). 

 Terias caffra, Felder, /. c. 

 $ . Terias seruli, Westwood in Gates 's Matabele-land, p. 342 (1881). 



Kanges from the Cape of Good Hope northwards to Abys- 

 sinia and westwards from Angola to Sierra Leone. 



The wet form is T. zoe-=cojffra^ the intermediate form is 

 T. candace = seruli, and the dry form is typical T. brigitta: 

 males both of the intermediate and dry forms seem to be 

 very rare ; it therefore seems possible that the females may 

 live until the commencement of the wet season, or possibly 

 they may take little part in the reproduction of the species. 

 Among our ninety-two examples of T. brigitta only two 

 males belong to the intermediate, and one to the dry form. 



3. Terias libythea. 



Papilio libythea, Fabricius, Ent. Syst. Suppl. p. 427 (1798). 



Terias drona, Horsfield, Cat. Lep. E. I. C. p. 137, pi. i. fig. 13 (1829). 



Terias lerna, Felder, Sitz. Ak. Wiss., math.-nat. 01. xl. p. 448 (i860). 



Terias senna, Felder, Reise der Nov., Lep. ii. p. 212 (1865). 



Terias rubella, Wallace, Trans. Ent. Soc. ser. 3, vol. iv. p. 323 (1867). 



Terias hainana, Moore, P. Z. S. 1878, p. 700. 



