160 PIERID.E. 



follows: <$ . Upperside: ground-colour similar. Fore wing : the 

 black markings also more or less similar but altogether smaller 

 and narrower, the terminal series of spots reduced to three or 

 four. Hind wing: similar, but there are two conspicuous black 

 spots on the discocellulars. Underside, fore wing : ground-colour 

 white, veins dusky, costa narrowly and apex suffused with pinkish 

 ochraceous ; the discocellular black spot as on the upperside ; 

 veins, 4, 5, 6, and apical portion of 7 broadly bordered on each 

 side with black scales that run parallel to but do not touch the 

 veins. Hind wing : ground- colour pinkish ochraceous, the veins 

 -conspicuously white ; all of them, except a small portion in the 

 middle of the discocellulars, bordered, in the manner similar to 

 the veins at the apex of the fore wing, with broad lines of black 

 scales on each side. 5 . Upperside similar to the uppei'side of 

 B. sliawi $ , but the wings are irrorated with black scales only at 

 their bases; the black markings on the fore wing are altogether 

 smaller and narrower, and the black curved, outwardly dentate, 

 discal band becomes diffuse and ill-defined posteriorly. On the 

 hind wing the discocellulars are prominently marked with an 

 iipper and a lower black spot, and the discal macular band is more 

 conspicuous than in B. sliawi $ . Underside precisely as in the <3 , 

 except that on the fore wing the discal black band is seen through 

 by transparency from the upperside. In both sexes the antennae, 

 head, thorax and abdomen as in B. shawi. 



Exp. 6 $ 42-54 mm. (1-68-2-12"). 



Hab. Within our limits recorded from Ladakh : the Digha Pass ; 

 15,000 feet north of Leh in Kashmir ; the Kardong Pass in the 

 Karakoram, 15,000 to 18,000 feet. 



A variety, var. potaxini, Alphe'raky, is recorded from the ^Xian- 

 Shan, Koko-JVor, and Western China. It differs from the typical 

 form on the upperside, in the <3 by the restriction and narrowness 

 of the black markings, in the $ by the ground-colour which is 

 tinged with greenish yellow. On the underside there seems to be 

 scarcely anv difference. 



Genus APORIA. 



Aporia, Hiibner, Vcrz. bek. Schmett. 1816, p. 90 ; Kirby, Aliens Nat. 

 Libr., Butt, ii, 1896, p. 139. 



Type, A. cratwgi, Linn., from Europe. 



lianfje. Europe ; ^Northern Asia ; Japan ; China ; the Himalayas 

 from Chitral to Bhutan ; Assam ; the Khasia Hills. 



<5 . Fore wing typically elongate, the dorsum very nearly 

 three-fourths the length of the costa ; costa very slightly 

 arched ; apex blunt ; termen convex ; tornus rounded ; dorsum 

 straight ; cell elongate, more than half length of wing ; disco- 

 cellulars oblique ; vein 6 from end of basal third of 7, upper 

 discocellular therefore absent, middle very little shorter than 



