GERTDIN^. 191 



side as in the other form, the discal band much as on the upperside, the ground colour 

 of both wings somewhat darker, a discal obscure brown transverse shade on the 

 hindwing. 



Female. Forewing with the base ochreous-grey, the outer band black and as in 

 the male ; the remainder of the wing white, containing the two brown streaks as in the 

 male. Underside similar to the male. 



Expanse of wings, ,? ? I5 inches. 



Dry-season Brood. 



Male. Upperside nearly all white except the outer black band of the forewlng, 

 markings as in the female of the intermediate form ; some slight ochreous-grey 

 suffusion on the basal and abdominal portions of the hindwing. Underside pale. 



Female, almost pure white above, the central brown bar on the forewing above 

 very small and obscure, the suffusion on the hindwing hardly visible. Underside as in 

 the male. 



Expanse of wings, ^ ? 1 1% to ly^ inches. 



Habitat. — Burma. 



Distribution. — The type came from Hsipaw in the Shan States ; there is a fine 

 series of all three forms in the B. M. from Thyetmyo, Chindwin, Beeling, and 

 Tilin Yaw. 



GERIDUS CROTON. 



Plate 614, figs. 1, ^, la, ?, lb, ^ , Ic, 9. 



Gerydus Croton, Doherty, Journ. As. Soc. Bengal, 1889, p. 439, pi. 23, fig. 9. de Niceville, Butt, of 

 India, iii. p. 25 (1890). Elwes, Proc. Zool. Soc. 1892, p. 617. Bingham, Fauna of Brit. India, 

 Butt. ii. p. 294 (1907). 



Imago. — Male. Upperside. Forewing rich dark brown, the apical portion beyond 

 the white band black ; the white band consists of one elongated, rather large spot 

 beyond the cell, with two round white spots below it, nearer the outer margin. 

 Hindwing of a uniform similar rich brown colour without markings. Underside 

 paler brown, more or less uniform in colour throughout both wings. Forewing 

 with the discal band much as on the upperside, sometimes the spots are a little 

 larger, and often tinged with ochreous, some obscure annular markings on the 

 costal and apical areas. Hindwing crossed with several very obscure annular 

 bands, sometimes almost indistinguishable, both wings with a sub-terminal line of 

 minute black dots. 



Female paler in colour than the male, the white discal band of the forewing 

 broader, the elongated spot beyond the cell becoming broader and forms a band which 



