76 MR. A. G. BUTLER ON LKPIDOPTERA [Jan. 17, 



104. PiNACOPTERYX ORTYGNA. 



Pieris ortygna, Hiibner, Zutr. exot. Schtnett. figs. 985, 986 

 (1832). 



S. Foda, 23rd, 28th, and 31st October; 20th and 23rd 

 November, 1885. 



The female of this species is unknown to me, but there is no 

 doubt that it somewhat resembles the female of Ganoris rapae. 

 Mr. Doiibleday identified this species with the Pieris orbona of 

 Boisduval's ' Lepidoptera of Madagascar," and thus led me into 

 error : the latter is a Glutophrissa. 



105. Phrissura SYLVIA, var. 



Papilio si/lvia, Fabricins, Syst. Ent. p. 470. n. 115 (1775). 

 t^-. Kangasi, 20th November, 1883; Stazione Gadda, 31st 

 January, 1884 ; Monbuttu in July and August. 



106. Belenois instabilis, sp. n. 



A very variable species, allied to £. calypso ; much smaller. 

 The male above milk-white ; primaries with narrow costal margin 

 black excepting at base where it is grey ; a black wedge-shaped 

 costal dash extending in a thin line along the upper discocelhilar 

 veinlet ; a large black spot on the lower discocellular ; apical area 

 and external border black, wider than in B. calypso, but with the 

 same white spots upon it : secondaries with a minute black dash on 

 the lower discocellular ; an arched series of black spots, the first 

 three in an oblique subapical series, the last three submarginal, 

 connected by a grey nebulous streak ; a marginal series of six large 

 triangular black spots, united externally by a black marginal hue ; 

 body normal. Primaries below nearly as in B. calypso, but the 

 subapical angulated black band more regular, not so much broken 

 up, an additional blackish spot on the first median interspace ; the 

 apical area creamy white divided by black veins, which are less 

 widely black-bordered than in B. calypso : secondaries sulphur- 

 yellow, with brown veins terminating in triangular marginal spots ; 

 a dark brown spot at the end of the cell and seven submarginal 

 spots : body below white. Expanse of wings 64 millim. 



5 . Darker than the darkest females of B. calypso ; resembling, 

 in fact, the female of B. clytie, but without the subapical white 

 spots, with the basal area heavily suffused with grey, and with the 

 oblique bar at the end of the discoidal cell of primaries imperfectly 

 separated from the broad blackish external area : on the under 

 surface it differs from the darkest females of B. calypso in having 

 the macular subapical band of the primaries widened into a broad 

 black belt, almost touching the oblique discocellular bar, the lower 

 submarginal spots small and the basal area yellower ; the secondaries 

 with the veins blackened from the middle outwards, the submarginal 

 black spots united into a blackish belt, and the last five yellow 

 marginal spots rounded and smaller. Expanse of wings 58 millim. 

 S $. Foda, 23rd, 27th, and 28th October; 17th and 26th 

 November, 1885. 



