228 
LEPIDOPTERA IN DIO A. 
Eyes naked, antennse long, more than half the length of the forewing, stout, 
club spatulate and abrupt, palpi sub-porrect, third joint a little longer than the second, 
longer in the female. Forewing somewhat triangular ; costa more arched in the female 
than in the male, apex somewhat angulate in the male, rounded in the female; outer 
margin convex, lower angle a little rounded, hinder margin slightly sinuous ; cell half 
the length of the wing; vein 7 terminates on costa before the apex, 8 absent, 9 from 
the middle of 7; 10 and 11 free, 12 short, ending on costa before end of cell. Hind- 
wing with vein la very short, 3 and 4 approximate from lower end of cell; sometimes 
with a slender tail, sometimes without, this difference occurring often in otherwise 
identical forms captured at the same time and place. 
Type, M. thwaitesi, Moore. 
MEGISBA MALAYA. 
Plate 627, figs. 1, la, $, lb, $ (Wet-season Brood), lc, Id, 9 (Dry-season Brood), le (larva 
and pupa). 
Lycsena malaya, Horsfield, Cat. Lep. E.I.C. p. 70 (1828). 
Lampides malaya, de Niceville, Journ. As. Soc. Bengal, 1881, p. 58. Wood-Mason and de Niceville, 
id. p. 249. 
Pathalia malaya, Moore, Journ. As. Soc. Bengal, 1884, p. 22. Doherty, id. 1886, p. 134. Wood- 
Mason and de Niceville, id. p. 108. 
Megisba malaya, Elwes, Trans. Ent. Soc. 1888, p. 375, pi. 11, fig. 1, $. de Niceville, Butt, of 
India, iii. p. 61, pi. 26, fig. 165, $ (1890). Watson, Journ. Bo. Nat. Hist. Soc. 1891, p. 44. 
Elwes, Proc. Zool. Soc. 1892, p. 621. Swinhoe, Trans. Ent. Soc. 1893, p. 292. Davidson, 
Bell and Aitken, Journ. Bo. Nat. Hist. Soc. 1896, p. 373. Mackinnon and de Niceville, id. 
1898, p. 379. Bingham, Fauna of Brit. India, Butt. ii. p. 313 (1907). 
Megisba thwaitesi, Moore, Lep. Ceylon, i. p. 71, pi. 34, fig. 3, 3a (imago), 3b (larva and pupa) (1881). 
de Niceville, Journ. As. Soc. Bengal, 1885, p. 46. Distant, Rhop. Malayana, p. 457, pi. 44, 
fig. 4 (1886). Hampson, Journ. As. Soc. Bengal, 1888, p. 356. 
Megisba sihhima, Moore, Journ. As. Soc. Bengal, 1884, p. 21. 
Pathalia albidisca, Moore, l.c. 
Megisba gunga, Swinhoe, Proc. Zool. Soc. 1885, p. 133, pi. 19, fig. 7. 
Wet-season Brood (Figs. 1, £, la, $, lb, $). 
Imago. — Male. Upperside dark brownish-black ; some specimens without 
markings, but generally there is a medial small pale patch on the forewing ; on the 
hindwing there is a very slender short tail at the end of vein 1, sometimes absent. 
Underside dull white. Forewing with basal, costal and outer marginal spaces suffused 
slightly with brown, some brown spots on the costa, a brown line closing the cell, a 
post-discal series of brown lunules, a sub-marginal sinuous brown line and a marginal 
line, including a series of brown spots. Hindwing with two rather large black spots 
near the base and a small one below them, another near the apex of the wing, a line 
