of Heterocera from Japan. 289 
the wings; the thorax greyish whity brown in the centre. 
Wings below pale shining brown, a discal line and a diffused 
belt beyond it greyish; fringe as above; costa of primaries 
yellowish ; a brown discocellular lunule in secondaries. Ex- 
panse 2 inches 6 lines. 
Yokohama (Jonas). 
Allied to O. sera of Felder. 
137. Mormo mucivirens, n. sp. 
Primaries above dull olive-green, with darker markings, nearly 
as in Mormo maura, edged with pale green; the pale brown 
diffused areas of M. maura replaced by sericeous grey more 
or less mottled with olive-green : secondaries purplish brown, 
the external area broadly darker ; fringe testaceous, intersected 
by a grey stripe: body corresponding with the wings. Under 
surface fuliginous brown; primaries sericeous, especially 
towards the inner margin, which is greyish; two dusky 
parallel discal stripes ; outer border rather paler than the rest 
of the wing; costa spotted with testaceous beyond the cell ; 
fringe with a testaceous basal line: secondaries with a large 
spot at the end of the cell and a discal stripe blackish brown ; 
external area dusky ; fringe as above: legs blackish, speckled 
and banded with testaceous. Expanse 2 inches 6-7 lines. 
Yokohama (Jonas). 
PERINENIA, n. gen. 
Nearly allied to Nenia, agreeing with it in the normal or 
three-branched median vein of secondaries*, but differing in its 
very broad compressed palpi, the terminal joint of which is at 
least twice as broad and abruptly truncated. Type P. 
lignosa. 
138. Perineenia lignosa, n. sp. 
Above shining fuliginous brown; primaries reticulated 
with paler brown; a longitudinal black streak through the 
cell, interrupted by white dots indicating the position of the 
orbicular and reniform spots, and terminating as it reaches 
a transverse undulated discal black line, beyond which are 
four or five decreasing black longitudinal dashes; a marginal 
series of black dots; fringe greyish, with a basal undulated 
testaceous line: secondaries with a broad blackish border ; 
fringe whitish : abdomen greyish. Wings below whity brown, 
with diffused and blurred blackish discal line and black disco- 
* It is placed among the “Quadrifide” because this vein ought to have 
four branches in all genera of that group. 
