232 LEPIDOPTEBA INDICA. 



entire lengtH, except for a short portion of the base ; second sub-costal, long, emitted 

 nearer the base of the first than to the base of the upper discoidal nervule ; third 

 sub-costal very short, emitted from the costal nervure at about opposite the apex of 

 the second sub-costal ; upper discocellular nervule absent ; middle and lower discocel- 

 lulars of about equal length, concave ; lower discoidal nervule from the point of 

 junction of the discocellulars ; second median nervule emitted some little distance 

 before the lower end of the cell ; sub-median nervure sinuous, following the shape of 

 the inner margin. Hindwing long, oval ; costa very straight, outer and abdominal 

 margin with an even curve ; costal nervure slightly arched at base, then straight to 

 the apex of the wing ; first sub-costal nervule emitted much before the end of the cell ; 

 upper discocellular nervule short, outwardly oblique, straight ; lower discocellular 

 longer, upright, concave ; second median nervule emitted a little before lower end 

 of cell. 



Type, P. hylax, Fabricius. 



PITHECOPS HYLAX. 

 Plate 628, figs. 1, ^ , la, ? , lb, ? . 



Papilio hjlax, Fabricius, Syst. Ent. p. 526 (1775); id. Sp. Ins. ii. p. 124 (1781); id. Mant. Ins. ii. 



p. 77 (1787). 

 Sesperia Burales hylax, Fabricius, Ent. Syst. iii. (i.) p. 304 (1793). 

 Polyommatus hylax, Godart, Enc. Meth. ix. p. 701 (1823). 

 Pithecops hylax, Horsfield, Cat. Lep. E.I.C. p. 66, pi. 1, fig. 2, 2a (imago), 2b, pupa (1828). Moore, 



Proc. Zool. Soc. 1865, p. 771. Butler, Cat. Fabr. Lep. p. 161 (1869). de Niceville, Joum. As. 



Sec. Bengal, 1882, p. 62 ; id. Butt, of India, iii. p. 49, pi. 26, fig. 161 (1890). Manders, Trans. 



Ent. Soc. 1890, p. 527. de Niceville, Journ. Bo. Nat. Hist. Soc. 1890, p. 297. Watson, id. 



1891, p. 43. Elwes, Proc. Zool. Soc. 1892, p. 621. Bingham, Fauna of Brit. India, Butt. ii. 



p. 308 (1907). 

 Lycsena hylax, Hopfier, Stett. Ent. Zeit. sxxv. p. 27 (1874). Staudinger, Ex. Schmett. p. 271, 



pi. 94, <J (1888). 



Imago. — Male. Upperside of a uniform brownish-black colour, without markings. 

 Underside, milk-white, markings chocolate-brown. Forewing with a post-discal series 

 of transverse short lines, the upper one the darkest, and two black sub-costal spots in 

 continuation ; a well marked band on the outer margin containing a series of similar 

 lines all white. Hindivlng with a post-discal paler line, a sub-terminal continuous line 

 and a series of black dots close to the margin ; a very large black spot at the apex of 

 the wing. Cilia of forewing brown, of hindwing white. 



Female, like the male, but there is a large white patch on the forewing above, a 

 little below the centre of the wing, which varies in size in many examples. 



Expanse of wings, $ \, % ^ inch. 



Habitat. — Sikkim, Assam, Burma and the Malayan sub-region. 



