of the Genus Teracolus, Swatns. 391 
] 
8. Teracolus Johnstont. 
Teracolus Johnstoni, Butler, Ent. Month. Mag. xxiii. p. 29 (1886). 
Teracolus eris (part.), Trimen, South Afr, Butt. ili. p. 93 (1889), 
Ranges in South Africa from Graham’s Town to Natal, 
beyond which point it is probably replaced by 7’. opalescens. 
It is one of the smallest of the 7. eris group, being (in its 
Jargest examples) only slightly superior in size to the typical 
form, from which it differs im its more elongated primaries, 
the more elongate form of the white area on these wings and 
of the apical ochraceous streaks or internervular spots, the less 
heavily bordered inner marginal black border on the primaries 
of the female, and the more abruptly terminated black costal 
band on the secondaries, which emits an acute streak to the 
apex along the costa, instead of being extended transversely 
a most to the radial vein. 
9. Teraculus eris. 
Pontia eris, Klug, Symb. Phys., Ins. pl. vi. figs. 15, 16 (1829). 
©. Idmais fatma, Felder, Reise der Nov., Lep. p. 189, pl. xxv. fig. 3 
(1865). 
©. Teracolus abyssinicus, Butler, Ann. & Mag. Nat. Hist. ser. 4, 
vol. xviii. p. 486 (1876). 
Ranges northwards from the Sabaki valley and Kilima- 
njaro to Abyssinia and Nubia, and westwards to Kordofan. 
The Idmais fatma of Felder is the dry-season form of the 
female. 
10. Teracolus opalescens. 
©. Teracolus opalescens, Butler, Ent. Month. Mag. xxiii. p. 30 (1836) ; 
g. P.Z.S. 1896, p. 125. 
Ranges from Delagoa Bay inland and northwards through 
Nyasaland to the Victoria Nyanza. 
This species attains to a greater size than any of the other 
forms of the 7. erts group ; it is also the most heavily black- 
bordered of them all, and has well-defined black marginal 
spots to the secondaries in both sexes; the white irregular 
edging to the external angle and lower portion of outer 
margin of primaries, which is usually well marked in 7. John- 
stont, is absent, as in ZY. eris, The primaries below have 
much larger discal black spots than in either of the latter 
species and three or four marginal black dots, whilst the 
secondaries have a much broader orange-yellow costal streak 
and traces of a discal transverse yellow streak from its extre- 
nity, also a bright saffron-yellow internal streak ; the female 
has the usual discal internervular series of dots on the under 
