( 279) 



Hind/iuings : with the costa white, the inner edge of the white patch irregular ; 

 rest of the wing cinereous, with two curved darker lines edged with yellowish and 

 with some scattered black patches ; submarginal line tine, irregularly denticulate 

 and edged with whitish towards apex. In the ? the whole hindwing as far as the 

 submarginal line, except the inner-marginal area, is coal-black. 



Thorax and abdomen cinereous ; face and palpi blackish ; vertex and shaft of 

 antennae snow-white. Underside dull cinereous, the hindwings paler. 



Expanse of wings : (?, 22 mm. ; ? , 24 mm. 



Two S S, three ? ? , from Fergusson Island, September to December. 



Several S S from Fiji, and a ? from Australia, either of this or a closely allied 

 species, are in the British Museum collection unnamed. 



20. Gathynia nigrescens sp. nov. 



Forewings : dark lead-colour, the lines thick, bronzy black ; the first at one- 

 third, angled in midwing, with some yellow scales on the inner edge ; the second 

 beyond two-thirds, nearly straight to inner margin before anal angle, followed by some 

 yellowish scales; fringe shiny, with a dark lironzy black basal line. 



Hi'iuhmngs : with the outer line consisting of round .spots lying in a curve, and 

 edged with yellowish scales, and with some yellowish scales towards base. 



Underside dull dark cinereous. Head, thorax, and abdomen cinereous. The d 

 has the face, palpi, and anal segments of abdomen blackish. 



Expanse of wings : c?, 24 mm. ; ? , 26 mm. 



Two (?t?, three ? ?, from Fergusson Island, October to December. In the ? ? 

 the costal area of forewings is sometimes speckled with paler. 



The species is nearly related to G. loiigipennis Hmpsn. from the Nilgiris. 



Platerosia gen. nov. 



S . Forewiivjs : elongate, narrow; costa slightly convex near base and before 

 apex, faintly indented in the middle ; apex rounded ; hindmargin obliquely curved, 

 subcrenulate, with a slight excision above anal angle ; inner margin lobed at base to 

 near the middle. 



Hindwings : nearly round, twice as broad as forewings ; costa strongly fringed 

 except at middle ; hindmargin crenulate, with a sharp tooth at veins 3, 4, 6, and 7 ; 

 inner margin developed. 



Abdomen (<?) long, extending beyond hindwings, with expansile anal tuft. 

 Antennae thick, lamellate, flattened; palpi porrect, slender; tongue absent; 

 frenulum stout ; the retinaculum at base of cell on the median vein ; legs short and 

 stout ; hind tibiae swollen, with four spurs. 



Neuration : forewings, cell one-third of wing ; discocellular very faint ; first 

 median at two-thirds, second well before end of cell, third from end; the two radials 

 stalked with last subcostal ; third and fourth subcostals stalked; second anastomosing 

 with first for a considerable distance, both rising towards base. Hindwings with cell 

 very broad ; discocellular very faint, at one-third ; the two subcostals from upper end of 

 cell ; radial fi-om about middle of discocellular ; first median from near base, second 

 just before end of cell, third from the end. 



Type : Platerosia j'oiiindipennis sp. nov. 



