i68 
SOUTH-AFRICAN BUTTEEFLIES. 
Chrysorychia. Legs longer and thinner than in Chrysorycliia^ and not, 
or very slightly, hairy ; fore-legs of $ usually with more or less developed 
spur and spine at extremity of tibia ; — of $ rarely similarly armed ; 
Quicldle and hind-legs with tibial spurs longer than in Chrysorychia. 
Pupa. — Thick, rounded, with blunt head and dor so -thoracic pro- 
minence. Without silken attachment, lying quite free under stones 
{Z. Thyra). 
Boisduval did not describe this genus, but merely figured as its 
type (op. cit.) Zeritis Neriene^ a species said to be from Guinea. 
Blanchard's brief diagnosis gives the generic name as " Zerythis, 
Boisd.," with the obvious intention of preserving the earlier author's 
designation ; his types are Z. Thero and Z. Thysbe of Linnaeus. 
Hiibner's much earlier nominal generic titles of Phasis (for the two 
species just named and Z. Pcdmus of Cramer) and Aloeides (for Z. 
Thyra of Linnaeus and Z. Pier us of Cramer) have never been diagnosed 
by any author,"^ and are therefore not adopted ; while Swainson's Nais^ 
as Westwood {op. cit.) remarks, is inadmissible from the fact that it is 
Cramer's species-name for the type (= Thy she, Linn.) converted into the 
name of the genus. 
There are five tolerably pronounced forms in this interesting genus, 
represented by the following species, viz., Z. Neriene, Boisd. (with 
which I provisionally — not having seen Neriene in nature — associate 
Lcroma, Wallengr.) ; Z. Zeuxo (Linn.) ; Z. Thy she (Linn.) ; Z. Thero 
(Linn.) ; and Z. Thyret (Linn.) The first section is characterised by a 
rather squarely chequered under surface of ochrey-yellow and cream- 
coloured spots separated by black lines ; but this in Leronia is mucJi 
obscurer in tint (though dotted here and there with silvery points), 
while the upper side is in both sexes uniform glossy dull-grey. The 
Zenxo section includes the brilliant forms which, in their shining 
golden or coppery-red upper sides spotted with black, so nearly re- 
semble the genus Ghrysophanus ; their under side is more or less 
ornamented with glittering steely or brassy spots. The third or 
Thysbe section is closely related to the second, but the fore-wings are 
angalated, the hind-wings with a distinct process at anal angle, and 
the under side adorned with remarkable silvery H- and W-like char- 
acters in the hind-wings. In the Thero section, the upper-side colour- 
ing is dark-brown with orange-red (not metallic or glossy) spots or 
patches ; the under side is splendidly adorned with metallic silvery- 
white spots and other markings ; the fore- wings are angulated or 
elbowed ; and there is usually, besides the anal-angular projection, a 
small pointed process at the end of the first median nervule. The last 
section, represented by Thyra^ is of a more robust type, with the 
upper side non-metallic, almost always orange-red bordered with 
blackish-brown and unspotted, while the under side is coloured with 
^ Hiibner's own line and a half of description are, as usual, utterly insufficient for the 
purpose. 
