(477 ) 



projection on veins 3 and 4, preceded by a similarly angnlated brown shade, and 

 sometimes followed by a dark blotch beyond the cell ; the cell-spot large, blackish ; 

 fringe concolorons. 



Ilindirings : the same, without the inner line. 



Underside much paler, almost unspeckled except towards hiudmargin of fore- 

 wings. Head, thorax, and abdomen like wings, the abdomen with a dark basal 

 ring- 

 Expanse of wings : 34 mm. 

 Two ? ? from Castro, Parana. 



The neuration of forewings agrees exactly with that of the Indian species of 

 Petelia, vein 11 Ijeiug free. In Thi/sampijya H.S. = Pachi/dia Guen., on the 

 other hand, vein 11 anastomoses strongly with the costal. 



Perissopteryx gen. nov. 



Closely allied to 'riii/sanopi/fia H.S., of wliich it is a further development. 

 Abdomen of S beneath with thick curled tnfts of hair. Hindwings of cj with a 

 large flap on inner margin, folded over on the underside, the false inner margin with 

 a fringe of long hairs, and the edge of the flap also fringed ; the hindwings small in 

 comparison with the forewings. Antennae pectinated. 



Neuration : forewings, cell not half as long as wing ; first median just beyond 

 half, second well before end of cell ; radials normal ; 7, 8, 9, 10, stalked ; 11 from 

 cell, anastomosing with the costal. In the hindwings the internal vein runs down 

 the flap, the wing being folded along the submedian fold. 



Type : Perissopteri/j- rielusa sp. nov. 



174. Perissopteryx delusa sp. nov. 



Forewings : vinous brown, mnch darker along the costa, with fuscons speckles 

 and striae ; the lines brown ; first near base, vertical ; second before middle, 

 followed by the small black cell-spot, which is faintly ringed with whitish ; outer 

 line slightly concave outwards ; a darker submarginal shade and apical cloud, with 

 a curved white mark from apex to vein 0. 



Hindwings : with straight obli<jue antemedian line, from about one-third of 

 costa to middle of inner margin ; cell-spot distinct, round, pure white. Fringes of 

 both wings concolorons, with a pale basal line. 



Underside reddish grey or fawn-colonr ; marginal third of forewings clouded 

 with red-brown; flap of hindwings reddish. Head, thorax, and abdomen cinereous, 

 the thorax tinged with raldish ; abdominal tnfts and antennae dark fuscous. 



Expanse of wings : 40 mm. 



One S from Costa Rica (Underwood). 



175. Thysanopyga nigristicta sp. nov. 



Forewings : greyish fawn, with delicate darker strigulae ; the lines darker, 

 rather coarse ; first at one-fonrth, vertical ; second slightly before the middle, also 

 vertical, touching the large round blackish cell-spot; outer line at two-thirds, faintly 

 curved, parallel to hindmargiu ; marginal third darker fawn-colour, with a diffuse 

 blackish cloud at apex ; marginal line fine, black ; fringe concolorons. 



Hind/rings : witii a dark mark at base, a straight aiitenipdian and very faint 

 cnrve<l jxistmedian line : cell-spot round, black, with a minnte white centre. 



