118 THE LEPIDOPTERA OF CEYLON. 



NYCHITONA XIPHIA (Plate 46, Fig. 6, 6a). 

 Papilio Xiphia, Fabricius, Spec. Ins. ii. p. 43 (1781) 

 Pontia Xiphia, Butler, Catal. Fabrician Lep. Brit. Mus. p. 229. 

 Papilio Nina, Fabricius, Ent. Syst. ii. p. 194 (1793). 

 Pontia Nina, Horsfield, Catal. Lep. Mus. E. I. C. p. 140. 



White : forewing with a short black oblique apical angular band, and a large 

 quadrate subapical spot ; base of costal border with black strigge : hindwing with a 

 very slender marginal line. Underside : forewing with the costal border and apex 

 marked with delicate grey-speckled strigge ; subapical spot less prominent : hind- 

 wing crossed by zigzag strigse, those on the disc assuming a transverse fascia. 



Expanse l^ to If inch. 



" Matale and Colombo. August in forest at Matale. June to December in 

 gardens at Colombo. Flight slow, scarcely rising above the ground" {Hutchison). 



" Kandy. Very common. Easy to capture " {Wade). 



" A low country species. Flight slow, and seldom seen away from low brush- 

 wood — its favourite haunt " (Mackwood). 



Genus TERIAS. 



Terias, Swainson, Zool. Illustr. 1st ser. pi. 22 (1820—21). 



Forewing subtriangular, generally round at the apex, rarely acuminate, costa 

 much arched at the base, exterior margin slightly oblique, posterior margin recurved ; 

 costal vein extending to somewhat over half the margin ; first subcostal at nearly 

 one-third and second at one-twelfth before end of the cell, third, fourth and fifth on 

 a foot-stalk beyond the cell ; upper discocellular shortest, erect, lower bent outward 

 at its middle, radial from end of upper; cell broad, extending to half the wing; 

 middle median at one-ninth, lower at one-third before end of the cell ; submedian 

 much recurved : hindwing broadly obovate or rounded; precostal nearly atrophied ; 

 costal vein arched ; subcostal straight to end of the cell, first branch much curved, 

 emitted close before the end ; upper discocellular shortest, lower very convex, out- 

 wardly oblique, radial from their angle ; middle median at one-eighth, lower at 

 nearly one-half before end of the cell ; submedian straight, internal recurved. Body 

 slender, thorax hairy; palpi short, scarcely extending beyond the head, flat, 

 squamose, third joint minute, pointed ; legs slender, squamose, tarsi long ; antenna 

 short, with a moderately stout grooved club. 



Type, T. Hecabe. 



TERIAS HECABE (Plate 45, Fig. 1. 1 a, *, ^ ?, Ic, larva). 

 Papilio Hecahe, Linnseus, Syst. Nat. i. ii. p. 763 (1767); Fabricius, Syst. Ent. p. 472. 

 Terias Hecabe, Swainson, Zool. Illustr. iii. 1, pi. 22; Butler, Catal. Fabrician Lep. Brit. Mus. p. 227. 



Male. Upperside lemon-yellow : forewing with a broad black outer marginal 

 excavated band, the costal border also narrowly black : hindwing ^"ith a prominent 



