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Show 1876.] MR. A. G. BUTLER ON THE GENUS TERACOLUS. 151 blackish scales; the black veins only crossing its outer area ; the black streak replaced by a tapering dark grey streak, which disappears just beyond the middle of the internal nervure ; marginal spots clearly defined and well separated; secondaries below with the veins white from the base to the middle of the wing and thence grey to the margin. Expanse of wings 2 inches 1 line. 2 . Pale testaceous, the apical spots of primaries stramineous; brown parts of the wing as in T. gavisa 2 , excepting that the subapical band of primaries bounding the apical spots is not irregular externally, and is of more than twice the width; the spot at end of cell is lost in the brown basal patch, and the spots towards anal angle of secondaries are almost lost in the broad marginal border: below the wings are testaceous, the base and apex of primaries and the secondaries with a yellow tint and clouded with pale orange ; the veins of external third of primaries are dusky, but on secondaries they are uniform with the ground-colour; the subapical, blackish, oblique streak of primaries is placed much nearer to the apex. Expanse of wings 1 inch 11 lines. S. Africa (E. C. Buxton). Type, B.M. I believe the above to be sexes; they have much in common. 82. TERACOLUS OMPHALOIDES, n. sp. Anthocharis achine, Boisduval (nee Cramer), Sp. Gen. Lep. i. p. 574. n. 21 (1836). This species differs from T. omphale in the narrower, black internal stripe of primaries, the obsolete character or absence of the male transverse stripe in the secondaries, and the red tint of the under surface of the latter wings. Expanse of wings, 3 1 inch 4-10 lines, 2 1 inch 5-10 lines. 3 2, S. Africa (11 examples, E. C. Buxton) ; 3, Zoolu (Sir A. Smith). Type, B.M. If it were not for the number of examples which we now possess of this form, I should have been disposed to look upon it as a sport of T. omphale. 83. TERACOLUS OMPHALE. Pieris omphale, Godart, Enc. Meth. ix. p. 122. n. 12 (1819). Anthochaais omphale, Boisduval, Sp. Gen. Lep. i. p. 574. n. 22 (1836). Callosune omphale, Kirby, Syn. Cat. p. 502. n. 23 (1871). Anthocharis eurygonel, Lucas, Rev. Zool. p. 341 (1852). Callosune eurygone, Kirby, Syn. Cat. p. 502. n. 19 (1871). 3 2, N.E. of Natal (13 examples, E. C. Buxton). B.M. The undersurface of the secondaries in this species is of a greenish white colour, with the usual angular streak and discoidal spot. 84. TERACOLUS EXOLE. 3 . Anthocharis exole (part), Reiche, Ferr. Gal. Voy. Abyss. Ent. p. 460, pl. 31. fig. 4 (1849). Callosune exole, Kirby, Syn. Cat. p. 503. n. 27 (1871). |