72 
MICJtOLEPIDOPTERA OE NEW GUINEA 
elongate, broadest before middle, costa arched from base to apex, convex, 
apex rounded, termen gently convex, outwardly oblique above, rounded 
and slightly prominent beneath. Glossy-white. Hind wing glossy-white, 
thinner scaled than fore wing, very faintly tinged ochreous. Cilia snow- 
white. 
Limen narrow, slightly convex, lateral emarginations moderate, oblique, 
rounded, lateral projections rather long, lateral rods dilated, sclerotized, 
broader above, with concave inner edge. Colliculum rather wide, moder- 
ately long ventrally, with a deep VV-shaped incision. Cestum narrow, 
tortuous, terminal fold short, broad. Signum moderate, distinctly serrate 
(Slide No. 327 I)). 
Moss Forest Camp, five km northeast of Lake Habbema, 2900 m, 
August 22, 1938. One specimen. Allied to preceding, but distinct by white 
thorax and shorter palpi. 
Chionothremma nivisperennis spec. nov. (figs. 61, 78) 
<? 22.5 — 26 mm, $ 25 mm. Head whitish, on upper half of face and on 
vertex suffused with yellow and reddish, between antennae with yellow. 
Palpus moderately long, pale yellow, terminal segment tinged darker 
under the scales. Thorax pale yellow anteriorly, mixed with ferruginous- 
crimson, white posteriorly (damaged). Abdomen in male blackish, 
anteriorly with white hind edge of segments, posteriorly whitish-ochreous 
mixed with blackish, anal segment snow-white; in female ochreous- 
whitish suffused with blackish anteriorly, sides ochreous, venter pale 
ochreous suffused with yeliow, preanal segment black, corethrogyne small, 
dark brown. Legs rather deep yellowish-ochreous, tibiae and tarsi suffused 
with pale ferruginous -ochreous at the outer side. Fore wing rather broad, 
scarcely dilated, in male costal fold moderately broad to 2 / s , broadest 
beyond middle, costa obliquely curved along fold, straight posteriorly, 
apex rounded, termen straight, somewhat outwardly oblique, rounded 
beneath; in female costa gradually curved from base to beyond middle, 
straight posteriorly, termen vertical above, rounded beneath. Purely 
snow-white, dull; in male extreme base of wing suffused with ferruginous- 
pink; in female a minute suffused yellowish streak along apex and upper 
half of termen ; costa narrowly edged with brownish-red from base to x / 4 ; 
a suffused yellow streak along basal fifth of dorsum; a citric-yellow very 
narrow streak around apex and termen not reaching tornus, with minute 
dentations on veins. Cilia snow-winte, glossy. Hind wing silvery-wiiite, 
glossy, faintly suffused with pale ochreous towards base, on base of dorsum 
irregularly strewn with some blackish scales, less distinctly so in female. 
Cilia snow-white, faintly tinged with ochreous on tornus and dorsum. 
Tegumen gradually dilated. Uncus with top rather deeply emarginate. 
Socius long, narrow. Gnathos strong, curved. Transtilla knob elongate, 
very oblique (strongly S-shaped), median projection moderate. Peniculus 
long, top flattened. Vinculum rounded. Valva semiovate, rather flattened. 
