18/6.] MR. A. G. BUTLER ON THE GENUS TERACOLUS. 133 



Peters, Reise n. Mossamb. Zool. v. p. 353, pi. 23. figs. 1, 2 

 (1862). 



Mozambique. 



4. Wings of male above uniformly sulphur-yellow, with the apex of 

 jmmaries and a spot at end of cell black; secondaries below 

 yellow, ivith an interrupted oblique black streak : female pale 

 sulphur -yelloiv, almost white, with the outer margins broadly 

 black; a black discocellular spot in primaries; secondaries 

 below lemon-yellow, with an angulated black streak. 



23. Teracolus mananhari. 



Pieris mananhari. Ward, Ent. Mo. Mag. vi. p. 224 (1870) ; Afr. 

 Lep. pi. ii. figs. 1-4 (1873). 



Teracolus mananhari, Kirby, Syn. Cat. p. 500. n. 2 (1871). 



Madagascar. 



This extraordinary species is clearly related to the T. ione group, 

 but it is very dissimilar from all the species in the genus. 



5. Wings white, more or less clouded with orange ; primaries 

 of the males with grey apical border and black veins, 



5 a. Wings of male grey at hase j orange area restricted and pale. 



24. Teracolus halimede. 



Pontia halimede, Klug, Symb. Phys. pi. 7. figs. 12-15 (1829). 

 Pieris halimede, Boisduval, Sp. Gen. Lep. i. p. 526. n. 129 (1836). 

 Idmais halimede, Kirby, Syn. Cat. p. 499. n. 13 (1871). 

 Anthocharis leo, Butler, Ann. Nat. Hist. ser. 3, vol. xvi. p. 397 

 (1865). 



White Nile {Petherick). B.M 



5 b. Wings of male almost entirely covered with deep orange. 



25. Teracolus pleione. 



Pontia pleione, Klug, Symb. Phys. pi. 8. figs. 7, 8 (1829). 



Terias pleione, Boisduval, Sp. Gen. Lep. i. p. 672. n. 33 (1836) 



Idmais pleione, Kirby, Syn. Cat. p. 499. n. 14 (1871). 



Idmais miriam, Felder, Reise der Nov. Lep. ser. 2, p. 190. n. 186 

 pi. 27. tigs. 3, 4 (1865). 



Teracolus chrysomela, Butler, Cist. Ent. p. 244 (1874). 



White Nile {Petherick). B.M. 



This species is much deeper in colour than Klug represents it to 

 be in his figure ; its affinities seem about equally balanced between 

 the two groups, of which T. fausta and T. eupompe may be consi- 

 dered as typical, the male nearly resembling the former, the female 

 more closely approaching the latter. 



The succeeding six species, constituting my Section 6, might 

 perhaps be separated generically from Teracolus, inasmuch as the 

 males have an embossed spot on the internal area of primaries near 



