new Species o/Pieridfe. 229 



costal nervule very broadly black ; the apical area broadl^r 

 black, the inner edge of which l^ irrorated with whit(! and 

 extends rather obliquely as far as the extremity of the lowest 

 median nervule, whence to the posterior angle it becomes 

 linear ; between the veins near the apex are five white 

 streaks, of which the third is the longest and broadest, the 

 others being more or less irrorated with black scales. 

 Posterior wings white, with the outer fourth from the apex 

 to the inner margin black, the black area being widest in 

 the middle and its inner edge irregular and irrorated with 

 grey scales. 



Underside. Anterior wings white, with the black area 

 more extended than on tiie upperside, and invading the upper 

 part of the cell, where, towards the base, it is irrorated with 

 white and tinged with yellow; the upper discocellular 

 nervule is black ; the rows of white spots in the apical 

 black area are much larger and more distinct than on the 

 upperside and six in number, with a narrow marginal 

 whitish streak between the two lowest median nervules. 

 Posterior wings with the basal two thirds yellow, shading 

 into white towards the apex ; the outer third black, with a 

 submarginal row of six greyish-white bars, angulated exter- 

 nally in the middle. 



Head and thorax black, clothed with long white hairs; 

 abdomen white. 



Expanse of wings 2^ inches. 



Belongs to the group of Delias isse, Cram. 



One specimen only. In Mr. Grose Smith's collection. 



Appias gisco. 



Male. — Upperside. Both wings pale yellow, with very 

 broad black margins. On the anterior wings the basal fourth 

 is densely irrorated with grey scales ; the black area extends 

 broadly along the costa and covers the apical and outer 

 marginal fourth, terminating on the inner margin at three 

 fourths distance from the base; its inner edge on the disk is 

 deeply indented between the veins. On the posterior wings 

 the outer fourth from a little above the apex to a little above 

 the anal angle is black, with its inner edge rather irregular 

 and irrorated with yellow scales. 



Underside as above, but on the anterior wings the basal 

 area is yellow, clouded with grey. On the posterior wings 

 the iinier three fourths is orange-yellow, slightly darker orange 

 on the costal margin ; tiie outer fourth being brown-black as 

 above. 



Ann. & Mag. N. Hist. Ser. 6. Vol. xv. IG 



