BEUDOBIXINJE. 65 



Th'jcla isocrates, Westwood, Trans. Ent. Soc. 1837, p. 1, pi. i. <J , J , structure of imago, and pupa. 



Dipsas isocrates, Horsfield and Moore, Cat. Lep. Mus. E.I.C. i. p. 33 (1857). 



Deudorix isocrates, Butler, Cat. Fabr. Lep. B. M. p. 181 (1869). 



ViracJiola isocrates, Moore, Lep. Ceylon, i. p. 104 (1881). de Niceville, Journ. As. Soc. Bengal, 1885, 

 p. 48. Doherty, id. 1886, p. 126. de Niceville, Butt, of India, iii. p. 477 (1890). Watson, 

 Journ. Bo. Nat. Hist. Soc. 1890, p. 35. Davidson and Aitken, id. p. 356. Betham, id. 1891, 

 p. 183. Mackinnon and de Niceville, id. 1898, p. 389. Nurse, id. 1899, p. 512 (note), 

 de Rhe-Philipe, id. 1902, p. 490. Aitken and Comber, id. vol. xv. 1903, p. 50. 



Hesperia pann, Fabricius, Ent. Syst. iii. (1), p. 276 (1793). 



Papilio pann, Donovan, Ins. Ind. pi. 38, fig. 1, $ (1800). 



Hair Streah Genus Thecla, Downes, on the habits of ; Calcutta Journ. Nat. Hist. ii. p. 408 (1842). 



Imago. — Male. Upperside violet-brown. Forevnng with the colour darkening on 

 the margins in certain lights showing a bright violet gloss on the inner area ; an 

 indistinct orange-ochreous patch, varying in size in different examples, beyond the cell, 

 only visible in certain lights. Hlndwing with the costal area and abdominal fold 

 blackish-brown, anal lobe whitish with a black spot in it, varying in size in different 

 examples, with some pale bluish-white scaling on its upper side, in some examples the 

 black spot nearly fills the whole of the anal lobe ; tail black, tipped with white. 

 Cilia of both wings with the basal part black, the outer half white, becoming bluish- 

 grey below the tail and round the anal lobe. Underside vinous-grey, or slaty-grey, 

 markings darker than the ground colour, edged on both sides with white. Foreioing 

 with a bar at the end of the cell, a discal band of conjoined spots, decreasing in size 

 hindwards, nearly straight down, from near the costa to below vein 2, where the spot 

 is very small. Hlndwing with similar discoidal bar and discal band, the latter somewhat 

 irregular, the third, fourth and sixth spots a little outside the others, then the band 

 with a sudden curve reaches the abdominal margin a little below its middle ; anal lobe 

 black with a white spot on its upper inner side, a smaller black spot ringed with 

 orange in the first interspace, with some blue, grey and white scaling between them ; 

 both wings with indications of a narrow sub-marginal band and very fine marginal 

 grey line. Antennse black, ringed with white, club with an orange tip, with a white 

 streak below at its base ; frons greyish-white ; eyes ringed with white ; head and 

 body above and below concolorous with the wings, abdomen below white. 



Female. Upperside brown. Forewing with the colour darkening towards the 

 margins, the orange-ochreous patch larger and more distinct and varying much in 

 extent, in some examples extending broadly to the base below the median vein. 

 Underside as in the male, but the bands are broader and more outwardly curved, the 

 black anal spots larger. 



Expanse of wings, ^ l-f-^ to ly^g, $ I-/0 to 2 inches. 



Larva, • 8 of an inch in length when full grown ; ground colour blackish-brown, 

 the constrictions between the segments well marked, the head comparatively large, 

 vol. IX. K 



