( 29) 



lu the single ? the fawn-coloured tinge is qnite absent ; the tints being pale 

 and dark gre}' or dark fuscous only ; but this is probably not a constant difference. 



Expanse of wings : 26 — 27 mm. 



One ?, 2 SS, from Dalhousie, May 181)1. 



Easily distinguished by the narrow central fascia with its blackish veins ; and 

 in particular by the oblique, not curved, hindmargin of the forewings. 



If). Perizoma verticata sp. uov. 



Forewings : pale grey, dusted with darker ; the basal patch and central fascia 

 brownish black ; edge of the former and inner edge of the latter nearly vertical, 

 slightly curved at costa, each margined by a very fine white line : the intervening 

 fascia with a rather darker grey centre ; outer edge of central fascia bluntly 

 prominent at veins 6 and 4, then incurved, and in lower third vertical ; margined 

 also by a fine white line ; snbmarginal line pale, waved, most distinct near costa, 

 preceded and followed by darker shades, especially at costa where they are somewhat 

 reddish tinged ; a small dark blotch on hindmargin below apex ; au irregular dark 

 marginal line ; fringe grey ; cell-spot large, blackish. 



Hindwini]s : pale grey, with faint traces of curved lines ; cell-spot dark. 



Underside pale, with the markings indistinctly shown. Head, thorax, and 

 abdomen cinereous ; metathorax and abdominal rings darker ; anal tuft ochreous. 



Expanse of wings : 22 mm. 



One 3 from West China. In appearance nearest to P. unij'asciata of Europe. 

 The angulation in the discocellular of hindwings is very slight, and may easily be 

 overlooked. 



20. Pseudocollix olivata sp. nov. 



Forewings: dull olive, finely speckled with darker ; costa black, from base to 

 end of basal patch, the cross-lines of the patch, themselves very faint, commencing 

 in black spots which coalesce ; a rufous streak along costal vein to the middle of 

 wing, the basal patch also slightly rufous-tinged ; inner edge of central fascia from 

 two-fifths of costa vertical to one-third of inner margin, wavy, starting from a black 

 spot on costa, and marked by smaller black spots on veins and inner margin ; outer 

 edge from two-thirds of costa to two-thirds of inner margin, starting from a large 

 black costal spot, angled on veins 6 and 4, inwardly dentate on all the veins, the 

 teeth black ; preceded by a fuscous-olive band, edged internally by a similar line ; 

 a large black cell-spot ; snbmarginal line pale, lunulate-dentate, preceded and followed 

 by fuscous-olive shades, the inner shade wholly interrupted between veins and 7, 

 and again between 3 and 4 ; black marginal dashes interrupted by the veins ; 

 fringe olive. 



llirnlwinqs : the same, but the markings less distinct, the cell-spot small ; a 

 slight rufous cloud in the costal half of central fascia. 



Head, thorax, and abdomen olive, the vertex, thorax, and abdomen tinged with 

 rufous. Underside shining whitish, flushed with flesh-colour ; base of costa of 

 forewings, cell-spots, a sinuous postmedian line, macular interrupted snbmarginal 

 line, and fine marginal line black. 



Expanse of wings : 26 mm. 



One i from the Khasias, June IS'J'J. 



