56 SOUTH-AFRICAN BUTTERFLIES. 



257. (8.) Pieris Ogygia, Trimen. 



(? $ Pieris 0(j//[fia, Trim., Trans. Ent. Soc. Lond., 1883, p. 356. 



Plate XI. fig. 2 (?). 



Ux}}. al., ($) 2 in. i lin. ; ($) 2 in. 6^ lin. 



$ White, with Hack marJcinjs. 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 much 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- 

 mity 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-ioing : 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. — Binl-ioing and 

 apex of fore-vnng pale chrome-yellow ; ncrvurcs of hind-iving universally 

 hlach. Fore-ioing : 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-wing : costa, from base to before middle 

 edged with orange-red ; a submarginal row of seven inter- ner-vular, 

 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 co7isideraUy larger. Hind-icing : 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-wi7ig : 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 Zochalia, Boisd. ; it is, perhaps, on the whole, more nearly allied 

 to the latter, especially as regards the ^. Ogygia is distinguished from 

 Zochalia by having in the fore-wing (i) a narrower, more angulated, 

 disco-cellular streak, and (2) a much narrower apical and hind-mar- 

 ginal border, enclosing no white spots; and in the hind-wing (3) 



