170 MESSRS. RILEY AND GODFREY ON 



narrow, even, black marginal border to the hindwing below enclosing 

 long narrow rectangular white marks. In agoranis this border is 

 more than double the width, runs up in conical projections along the 

 veins and encloses oval or circular white patches. In singhapura 

 the enclosed spots are still larger, frequently divided in two by a 

 narrow black line, semi-circular in shape, reaching from vein to vein 

 and cut off squarely by the veins. 



NYMPHALID^E. 



SATYRINiE. 



3. Mycalesis siamica, sp. nov. 



(Plate IV, figs. 2 and 3.) 



cf. Upperside, forewing. — Dark brown with two parallel 

 narrow darker marginal lines, the markings of the underside (princi- 

 pally the lighter marginal area and the paler subapical bar) showing 

 through. In area la, rather towards the base, is a large dull pur- 

 plish shiny area, and above this, in area lb close to vein 1 which 

 curves below it, a single pencil of hair, its free end resting in a small 

 oval patch of dark shiny scales. There is a further sex-mark in area 

 3 in the form of a diffuse mealy patch of dull ochreous scales, just 

 reaching the edge of the lighter marginal area. Hindwing. — Slight- 

 ly darker than the forewing, underside markings not showing 

 through so conspicuously, marginal lines the same as in forewing. 

 Darker towards costa, velvety. A dark brown pencil of hair arises 

 near the base of cell and curves slightly towards costa, so as to lie 

 along the nearly white oval patch of scales towards the base of 

 area 7. 



Underside, both wings. — Very dark velvety brown, lighter 

 basally, margins broadly silvery grey, marginal lines as above. 

 Forewing. — The marginal silver-grey band, lightest in areas 4 

 to 6 proximally (the subapical bar of upperside mentioned 

 above), is broadest on the costa. Its inner edge extends 

 in an almost even gentle curve from costa just before end of 

 vein 12 to centre of area 4, where it is rather sharply angled and 

 runs almost straight and parallel to the margin, to vein 2, thence 

 inwardly slightly to vein 1, where it merges into the shiny inner- 



JOURN. NAT. HIST. SOC. SIAM. 



