132 MR. A. G. BUTLER ON THE GENUS TERACOLUS. [Jail. 18, 



on the margin of the apical area within the lower discoidal 

 interspace, and two marginal spots terminating the first and 

 second median branches ; secondaries with the base of costa 

 orange ; a black discocellar dot ; a broad oblique black bar, 

 interrupted by the nervures from costa to third median, a spot 

 on second median interspace, a dot on first median, and a spot 

 on interno-median interspace, all black. Female with the apical 

 patch orange, bordered with black, and crossed by a broad lunu- 

 lated black band, or black spotted with yellow ; secondaries 

 below either pinkish grey, with a broad, tapering, oblique brown 

 streak, or yellow with a subangulated macular black streak 

 (as in the male) ; with costa orange, and outer border broadly 

 brown. T. imperator. 



20. TERACOLUS IMPERATOR. 



Anthocharis tone, Reiche, in Ferret & Galinier, Voy. Abyss, pi. 30. 

 figs. 1, 2, 5-7 (1849). 



Callosune ione (part.), Kirby, Syn. Cat. p. 500 (1871). 



Teracolus jobina (part.), Butler, Lep. Exot. p. 116 (1872). 



6, Senegal (E. C. Buxton). Type, B.M. 



3 h. Violet apical patch of male very widely bordered with black ; 

 internal vein of primaries white, remaining veins partly black ; 

 base densely dusted with grey ; veins of secondaries frequently 

 black, but not so distinctly as in the two preceding forms, with 

 terminal black spots ; apex of primaries and the whole of 

 secondaries below cream-coloured, with veins dusky ; nervures 

 terminating in black dots ; black discocellular dots ; secondaries 

 below with a black subcostal spot (not a transverse bar). Female 

 with the apical patch orange, bordered with black and crossed by 

 black spots, or black with three decreasing white spots ; second- 

 aries below lemon-yellow, partially reticulated with brown, crossed 

 by an oblique brown streak, and two brown spots on first median 

 and interno-median interspaces ; discocellular spots well marked. 



21. Teracolus ione. 



Pieris ione, Godart, Enc. Meth. ix. p. 140. n. 74 (1819). 



Anthocharis ione (part.), Boisduval, Sp. Gen. Lep. i. p. 515 (1836). 



Callosune ione (part.), Kirby, Syn. Cat. p. 500. n. 3 (1871). 



Anthocharis erone, Angas, Kaffirs Illustrated, pi. 30. fig. 3 (1849). 



Var. Anthopsyche speciosa, Wallengren, Kongl. Svenska Vetensk. 

 Akad. Handl. p. 16 (1857). 



cJ 2 , Natal {Becker, Argent, Burrows, E. C. Buxton). B.M. 



A small male, agreeing with Wallengren's description, is amongst 

 the specimens presented by Mr. Buxton. 



3 i. Violet patch of the male only represented by two spots ; 

 under surface of secondaries yellow. 



22. Teracolus eunoma. 



Pieris eunoma, ITopffer, Ber. Verb.. Ak. Berl. p. 640. n. 2(1855) ; 



