128 MR. A. G. BUTLER ON THE GENUS TERACOLUS. [Jan. 18, 



1 c. No black streak on inner margin of primaries. T.fatma. 



3. Teracolus fatma. 



Idmais fatma, Felder, Reise der Nov. Lep. ii. p. 189. n. 185, 

 pi. 25. fig. 3 (1865). 



Idmais eris, var., Kirby, Syn. Cat. p. 499. n. 12 (1871). 



Kordofan. 



This species is smaller than T. eris, has the external area of pri- 

 maries tawny, the discal spots disconnected, and no marginal spots 

 on secondaries. I have seen a specimen in Mr. Diuce's collection. 



4. Teracolus coliagenes. 



Euchloe coliagenes, Butler, Ann. & Mag. Nat. Hist. ser. 3, vol. xx. 

 p. 216, pi. 4. figs. 4, 5 (1867). 



Callosune coliagenes, Kirby, Syn. Cat. p. 500. n. 4 (1871). 



White Nile {Petherick). Type, B.M, 



Precisely like the T.-fausta group in pattern, but of a sulphur- 

 yellow colour. 



2. Wings sulphur -yellow, white, or pale ochreous ; below with 

 transverse bands across the disk oj' secondaries. 



2a. Wings yellow, markings above much like the T.-fausta group. 



5. Teracolus protomedia. 



Pontia protomedia, Klug, Symb. Phys. pi. 8. figs. 13, 14 (1829). 



Pieris protomedia, Boisduval, Sp. Gen. Lep. i. p. 509. n. 105 

 (1836). 



Teracolus protomedia, Kirby, Syn. Cat. p. 500. n. 4 (1871). 



cJ 2 > White Nile {Petherick). B.M. 



The plumule of this species is, as might be expected, like that of 

 the other species of Teracolus. 



6. Teracolus Amelia. 



Idmais amelia, Lucas, Rev. Zool. p. 427 (1852). 



Senegal. 



Allied to the preceding species. 



2 b. Wings above pale ochreous and white. 



7. Teracolus velleda. 



Idmais velleda, Lucas, Rev. Zool. p. 428 (1852). 



Abyssinia. 



Intermediate between T. amelia and T, vesta. 



8. Teracolus vesta. 



Idmais vesta, Reiche, Ferret & Galinier, Voy. Abyss, p. 463, pi. 31 . 

 figs. 7, 8 (1849). 



Caffraria {Becker), S. Africa (£". C. Buxton). B.M. 



9. Teracolus hewitsonii. 



Idmais hewitsonii, Kirby, Syn. Cat. p. 498. n. 4 (1871). 



