56 SOUTH-AFRICAN BUTTERFLIES. 
257. (8.) Pieris Ogygia, Trimen. 
$ Pieris Ogygia, Trim., Trans. Ent. Soc. Lond., 1883, p. 356. 
Plate XI. fig. 2 ($). 
Ex;p. cel., ($) 2 in. i lin. ; ($) 2 in. 6^ lin. 
J White, luith Hack marldngs. Forc-iving : costa edged very nar- 
rowly with black ; base with a slight pearly gloss ; at extremity of cell 
an oblique angulated transverse streak, commencing rather widely just 
below costa, narrowing mnch to angle (where it is narrowest), and 
thence abruptly broad to its termination ; a rather narrow apical and 
hind-marginal border (widest at apex), rather sharply indenting the 
white on nervules, ending abruptly on first median nervule ; at extre- 
]nity of submedian nervure a small spot, quite separate from hind- 
marginal border ; immediately before border, four rather small spots, 
of which three form an oblique row from costa (the first touching apical 
border), and the fourth is between second and third median nervules 
and rather indistinct. Hincl-iving : on hind-margin six nervular spots, 
all (except that at end of submedian nervure, which is small and almost 
linear) large, subovate, well separated. Under side. — Hind-iving and 
apex of fore-wing pale elirome-yellow ; nerviircs of liind-iuing universally 
hlack. Fore-wing : in upper part of cell, for a little distance from 
base, a flush of orange ; disco-cellular terminal stripe fainter than on 
upper side, commencing a little farther from costa ; four submarginal 
spots distinct ; apical yellow extending narrowly to about middle of 
hind-margin ; a hind-marginal row of seven small inwardly-acuminate 
black nervular spots. Hind-ioing : costa, from base to before middle 
edged with orange-red ; a submarginal row of seven inter- nervular, 
small, subsagittate black spots, of which the middle or fourth one is 
very small ; hind-marginal spots all smaller than on upper side (except 
that at the end of submedian nervure, which is larger), narrow, flat- 
tened, sub-rhomboidal, well separated ; a faint blackish dot on each 
side of first median nervule near its origin ; on fold between median 
and submedian nervures, for a little distance from base, a very faint 
orange streak. 
$ Similar to $, hut considcrally larger. Hind-wivg : a submar- 
ginal row of five small blackish spots, corresponding to the sub-sagittate 
ones of the under side, but wanting the first and last spots. Under 
SIDE. — Fore-wing : basal flush of orange wider. Hind-wing : a black line 
marks middle part of fold between median and submedian nervures. 
This species partakes of the characters of both P. Calypso, Drury, 
and Zoclialia, Boisd. ; it is, perhaps, on the whole, more nearly allied 
to the latter, especially as regards the Ogygia is distinguished from 
Zoclialia by having in the fore-ioing (i) a narroAver, more angulated, 
disco-cellular streak, and (2) a much narrower apical and hind-mar- 
ginal border, enclosing no white spots ; and in the liind-iuing (3) 
