38 PAPILIO Js ID JE. 



borders merges into that form. It can, however, be distinguished 

 by its general dark tone of colouring on the upperside ; on the 

 fore wing the discal series of cream-coloured streaks are much 

 shorter and conspicuously separated from one another by the broad 

 black edgings to the veins ; on the hind wing the dorsal margin 

 is very broadly bordered with black which in interspace 1 all but 

 merges into the black terminal area, the inner margin of this black 

 area extends straight across the wing and is only slightly curved, 

 not zigzag ; lastly the tornal ochraceous-red spot is always separated 

 from the blue lunule above by a narrow interval of black. Under- 

 side similar to that of spliyrus but darker. 



Exp. c? $ 68-78 mm. (2-68-3-1"). 



Hob. The Eastern Himalayas : Sikhim ; Bhutan ; the Chumbi 

 Valley : Burma ; Northern and Southern Shan States ; extending 

 to Western China and Tibet. 



506. Papilio XUthus, Linn. Syst. Nat. ed. 1767, p. 751 ; fryer, Rhop. 

 Nikon. 1886, p. 3, pi. 1, figs. 2, 2 a, 26; Moore in Anderson's 

 Zool Res. Tunan Exp. ii, 1878, p. 923. 



Papilio xanthus, Rothsch. Nov. Zool. ii, 1895, p. 278 ; Moore, Lep. 

 Ind. yi, 1903, p. 45. 



c? $ . Upperside black with cream-coloured markings as 

 follows : 1'ore wing : cell with four or five slender somewhat 

 broken streaks from base that extend for two-thirds of its length, 

 followed by a short transverse bar and another similar bar along 

 the discocellulars ; a streak from base not extended beyond the 

 disc in interspaces ] a and 1, the streak in the latter angulated 

 downwards below origin of vein 2, its apical portion double; a 

 discal series of elongate subtriangular spots that decrease in size 

 towards the costa, in interspaces 2 to 7, the spots in 6 and 7 with 

 an oval black medial spot generally dividing them in two ; a spot 

 near base of interspace 8 followed by a diffuse small patch of 

 similarly coloured scales ; finally a subterminal complete series of 

 lunules. In the $ between the discal and subterminal series 

 of cream-coloured markings there is a complete postdiscal series of 

 transverse somewhat diffuse pale spots. Hind wing : a broad streak 

 from base nearly filling the cell, a streak in interspace 1 extended 

 for three-fourths of its length : shorter streaks in the interspaces 

 beyond the cell ; that in interspace 7 interrupted by a large black 

 spot (this spot in the $ paler) ; a postdiscal series of diffuse spots, 

 cream-coloured (except the tornal spot which is blue) in the <f r 

 blue in the $ , followed by a subterminal series of cream-coloured 

 lunules, the lunule at the tornal angle centred with black in the J , in 

 the $ also centred with black but with its upper half ochraceous ; 

 the lunule in interspace 8 with its upper horn elongate, produced 

 down the tail. Underside : fore wing similar, the cream-coloured 

 markings broader, the postdiscal series of transverse spots present 

 also in the c? ; in both sexes that and the subterminal series form 

 continuous bands. Hind wing : the cream -coloured markings very 

 broad on the basal half of the wing, separated only by the black 



