24 
MICROLEPIDOPTERA OF NEW GUINEA 
inner edge bristled; harpe, a long spike and a sinuate longitudinal fold. 
Vinculum very short. Anellus erect-ovate, broad, with two apical bristly 
projections. Aedoeagus rather long, straight. Cornuti, an apical patch of 
short spikes. (Slide no. 1050 I), type.) 
Top Camp, 2100 m, January 25, 1939. One specimen. Perhaps allied 
to I. accuralis (Walker) and I. mylias Meyrick. Distinct by the large 
black discal spot. 
Imma arenaria spec. nov. (fig. 742) 
20 mm. Head, thorax, abdomen pale ochreous-yellow, abdomen with 
suffused pale greyish-lilac transverse bands, basal half of venter whitish 
(thorax denuded, medianly traces of greyish-lilac suffusion). Antenna 
moderately ciliated, pale yellow, towards apex slightly infuscated. Palpus 
pale yellow, apical half very pale greyish-lilac. Legs whitish-yellow. 
Fore wing with veins 7 and 8 separate; elongate, dilated, costa gently 
curved at base, slightly prominent at 2 / 3 , apex obtuse, termen hardly 
rounded, little oblique. Pale ochreous-yellow, somewhat brighter ochreous 
towards costa; a moderate subbasal pale lilac-grey transverse fascia, 
somewhat outwardly oblique from below costa to below base of fold, 
truncate above, furcate below ; anterior branch of this furcation obliquely 
to base of wing, thence along base of dorsum, posterior branch angularly 
bent, upper half along fold to 1 / i of wing, slightly dilated, lower half out- 
wardly oblique, to 2 / 5 of dorsum, narrowed in middle ; a moderately broad 
lilac-fuscous fascia from 3 / a of costa to beyond 3 / 4 of dorsum, abruptly 
narrowed along lower 2 / 3 , anterior edge well-defined, moderately concave; 
lower 2 / 3 of posterior edge ill-defined, obscured by pale brownish suffusion, 
extending 1 / 3 towards termen; a small outwardly oblique greyish-lilac 
dot on 4 / 5 of costa connected by a suffused brownish line with tornus, 
indication of a second such line beyond lower half of preceding; a well- 
defined black marginal streak from costa before apex to tornus, narrowed 
below, its anterior edge obtusely dentate on terminal veins. Cilia (im- 
perfect) pale greyish, a darker basal shade and a narrow^ pale basal fine. 
Hind wing fuscous, a large semicircular pale ochreous-yellow patch with 
base along basal 4 / 5 of costa, extending more than halfway across disc. 
Cilia (imperfect) pale greyish. 
Tegumen moderate, ovate, with bristled outer edge. Anus large. Uncus, 
gnathos absent. Transtiila narrowed in middle. Valva strong, dilated, 
cucullus a projecting round knob, densely covered with long bristles; 
sacculus moderate, with bristled edge, beyond its top a series of strong 
bristles; harpe, a long postmedian hook. Vinculum small. Anellus with 
membraneous base, apically forming two rounded, bristled pads. Aedoe- 
agus rather long, moderately bent, with dilated base. Cornuti, a dense 
sheaf of short spines and a strong sclerite. Coremata extremely large: 
