GERYDUS. 295 



667. Gerydus biggsii, Distant, Rhop. Malay. 1884, p. 206, pi. 22, 



fig. 12 $ ; de N. Butt. Ind. iii, 1890, p. 24. 



d" . Upperside : dark brown. Fore wing : base up to a broad 

 obliquely-placed white fascia that crosses the wing paler brown ; 

 the fascia extends unbroken from the costa to just above the 

 tornal angle and is broadest in the middle. Hind wing: uniform, 

 immaculate. Underside: greyish brown. Fore wing: with a large, 

 medial, anteriorly somewhat rounded, white patch, that extends to 

 the dorsal margin ; base, cell and costal margin with some trans- 

 verse annular markings more clearly denned than in G. boisduvali ; 

 an anterior, postdiscal, transverse series of slender dark lunules 

 and a subterminal series of black spots. Hind wing : ground- 

 colour with a purplish gloss ; basal, subbasal, discal and postdiscai 

 transverse annular curved bands more or less obscure and incom- 

 plete, followed by a subterminal series of black dots. Antennae, 

 head, thorax and abdomen brown ; beneath : the palpi, head, 

 thorax and abdomen slightly paler. 5 . Very closely resembles 

 the cT both on the upper and under sides, but the oblique discal 

 white fascia on the fore wing above is distinctly narrower, and on 

 the underside the ground-colour is paler than in the tf ; the trans- 

 verse annular markings on both fore and hiud wings much more 

 clearly denned. Antennae, head, thorax and abdomen as in 

 the d. 



Exp. rf ? 38-41 mm. (1-52-1-62"). 



Hob. Lower Burma ; Tenasserim ; Malay Peninsula ; Sumatra. 



A very distinct form that does not seem to vary much. 



668. Gerydus irroratus, Druce (Miletus), P.Z.S. 1874, p. 106. 

 Gerydus stygianus, Sutler, A. M. N. H. (5) xiii, 1884, p. 194. 

 Gerydus irroratus, var. assamensis, Uoherty, J. A. S. B. 1891, 



p. 37, pi. 1, fig. 7. 



?c?. Upperside : fuliginous brown. Fore wing: a comparatively 

 large, oval, pale or whitish spot surrounding the base of vein 4, but 

 not entering the cell. Hind wing : uniForm, immaculate. Under- 

 side : pale greyish-brown. Fore wing : ccsta, cell and basal area 

 anteriorly with very obscure, transverse, annular markings ; the 

 basal area posteriorly with a dusky diffuse patch, bordered ex- 

 teriorly by a very ill-defined, pale, brownish-white cloud ; a post- 

 discal, somewhat obscure, very slender lunular white line and some 

 subterminal black dots. Hind wing : with transverse, annular, 

 broad, brown, curved bands showing distinctly on the paler 

 ground-colour ; a subterminal transverse series of black dots. 

 Antenna?, bead, thorax and abdomen brown ; beneath : the palpi, 

 head, thorax and abdomen paler. 



Exp. J 41 mm. (1-62"). 



Hob. Described originally from Siam. Procured by Mr. Doherty 

 within our limits in Assam : Dhansiri Valley ; Naga Hills. Ter- 

 nate ; Amboina. 



Notwithstanding that Siam and Ternate and Amboina are such 



