PAPILIONIN^. 141 



before end of the cell ; discocellulars very long and oblique, upper slightly concave, 

 radial from their angle ; cell two-thirds length of the wing ; middle median at one- 

 fourth, lower at one-half before end of the cell ; submedian straight, internal recurved. 

 Body stout, thorax and head hairy ; palpi long, very laxly pilose beneath ; legs long ; 

 antennge long, with a gradually thickened club. 



PRIONERIS SITA (Plate 54, Fig. 2, cJ). 



Pieris Sita, P'elder, Novara Voy. Lep. i\. p. 161, pi. 25, fig. 12 (1865). 

 Prioneris Sita, Wallace, Trans. Ent. Soc. 1867, p. 385, 



Male. Upperside greyish-white : forewing with the veins lined with black, 

 expanding and confluent at their end : hindwing with the veins black only at their 

 end ; both wings with a very slight and indistinct sub marginal lunular band formed 

 by sparsely dispersed black scales. Underside with all veins on both wings black 

 lined, the submarginal lunular band more defined, the hindwing with the marginal 

 interspaces scarlet bordered with white ; apex of forewing and basal area of hindwing 

 yellow. 



Expanse 3f inches. 



" Hills from 2000 to 6000 feet. Comparatively scarce " {Mackwood). 



Subfamily PAPILIONIN^. 



Abdominal margin of the hindwing curving inwards. 



" This noble group of butterflies includes some of the largest and most magnificent 

 species in Ceylon. They are notable for their deliberate sweeping mode of flight, 

 and for its occasionally somewhat soaring character. This latter peculiarity is to 

 be strikingly observed in the glorious Ornithoptera Darsius, which is not uncommon 

 in open woods, and is most conspicuous from its rich black and golden colour " 

 {Dr. Thwaites' MS. Notes). 



Genus PATHYSA. 



Pathysa, Reakirt, Proc. Entom. Soc. Philadelphia, iii. pp. 503, 504 (1864). 

 Forewing broad, triangular, costa very considerably arched, apex pointed, 

 exterior margin oblique and concave in the middle ; cell long, broadest across the 

 middle ; first subcostal branch short and anastomosed to the costal, emitted at one- 

 seventh, and second branch at one-tenth before end of the cell ; discocellulars nearly 

 straight, upper slightly longest: hindwing broad, costa long and oblique; exterior 

 margin convex, very sinuous, produced into a very long narrow ensiform tail; cell 

 very long, narrow ; first subcostal at nearly one-half before end of the cell, second 



