472 Revision of the Genus Teracolus, Swans. 
much reduced and less clear; then comes the arethusa of 
Drury (which has received the names of eborea (part.), hanna, 
amytis, and cebrene), in which the orange has almost disap- 
peared from the apical patch; the remaining varieties agree 
with the latter in character, but are sulphur-yellow or bright 
ochre-yellow in ground-colour. 
Race Teracolus ocale. 
Anthocharis ocale, Boisduval, Sp. Gén. Lép. i. p. 584 (1838), 
Teracolus loandicus, Butler, P. Z. S. 1871, p. 724; Lep. Exot. p. 91, 
pl. xxxiv. fig. 10 (1872). 
Teracolus suffusus, Butler, P. Z. 8. 1876, p. 152, pl. vi. fig. 10. 
Teracolus angolensis, Butler, P. Z. 8. 1876, p. 154. 
Occurs along the $.W. coast in the neighbourhood of 
Angola, and possibly further south. 
The wet-season form of this race most nearly resembles 
T. evippe, var. pseudocale, but the female seems always to 
have the apical patch divided by a clear and often broad 
orange belt. 7’. suffusus was based upon an unusually dark 
and dwarfed example of the female. Wet, intermediate, and 
dry phases are all much alike on the upper surface, the dry 
form alone having much less black on the inner edge of the 
orange apical patch, giving it a totally different aspect from 
the southern dry phase of typical 7. evippe, which has a 
fairly well-marked continuous black inner edging to the apical 
patch of the male; it is, however, possible that intergrades 
may occur between the two extremes. ‘I'here appears to be 
no dry phase to 7’. evippe at or near Sierra Leone. 
66. Teracolus epigone. 
Anthopsyche epigone, Felder, Reise der Noy., Lep. p. 186 (1865). 
Teracolus microcale, Butler, Ann. & Mag. Nat. Hist. ser. 4, vol. xviii. 
p. 487 (1876). 
Ranges from Upper Egypt to the White Nile and Abys- 
sinia, and occurs also near Aden. 
This species nearly resembles the Angolan 7. ocale in all 
its phases, but the male always has a well-detined black inner 
border to the orange apical patch on the primaries, whereas 
the female is less prominently marked above with black than 
in any form of 1’. evippe, the spot which terminates the 
internal blackish streak on the primaries being wholly absent, 
and even the basal blackish irroration being either much 
restricted or wanting.’ At the same time, if it could be shown 
that 7. ev’ppe extended across Africa northwards from the 
West Coast, I should be inclined to regard J’. epegone as a 
mere climatic race; but there seems to be no evidence what- 
