64 
MICROLEPIDOPTERA OF NEW GUINEA 
the latter reaching to beyond middle of costa, in male costa little curved 
anteriorly, straight posteriorly, in female considerably curved anteriorly, 
gently posteriorly, apex rounded, termen straight and vertical above, 
rounded and little oblique beneath. Snow-white, posterior fourth of costa 
and termen with a minute suffused yellow streak, reaching to tornus; a 
short suffusion on base of costa of the same colour, an ovate well-defined 
jet-black dot in apex. Cilia snow-white. Hind whig glossy, white, faintly 
tinged pale yellowish, a blackish spot in apex, its inner edge suffused, 
shortly indent above. Cilia snow-white. 
Tegumen erect, clavate, base narrow. Uncus moderate, erect-ovate. 
Socius, an elongate patch of minute bristles. Gnathos long, arms slender, 
dilated before apex, hook long, narrow. Transtilla knob moderate, 
elongate, median projection long. Peniculus rather long, slender, conical. 
Vinculum ovate, lower edge somewhat undulate. Valva semispheroid. 
Aedoeagus with a moderate point (Slide No. 315 D). 
Limen narrow, laterally with weak but rather broad plates, lateral 
emarginations scarcely present, lateral projections minute. Colliculum 
moderate, slightly dilated below. Cestum moderately broad, tortuous, 
terminal fold moderately broad, rather long. Signum moderate. Eighth 
tergite truncate (Slide No. 334 D). 
Mist Camp, 1800 m, January 11—17, 1939 (holotype: January 12). Top 
Camp, 2100 m, January 25 — 28, 1939 (allotype). Two males, four females. 
Allied to carbonifera spec, nov., also showing a connection with the pythia, 
group. 
Chionothremma placida spec. nov. (figs. 35, 56, 68, 70) 
19 — 22 mm, ? 21 — 23 mm. Head pale yellow, face in male paler 
beneath. Palpus pale yellow, median segment mixed with black, terminal 
segment black, tip mixed with white. Thorax pale yellow anteriorly, paler 
in female, whitish in male posteriorly. Abdomen snow-white, suffused 
anteriorly with black, except hind edges of segments in male, with 
brownish in female, venter snow-white, preanal segment blackish below 
and at the sides, anal tuft whitish-ochreous, shining in male, corethrogyne 
brownish-black. Legs white, anterior tibia and tarsus suffused with 
blackish above, articulations with fine white rings, median tarsus slightly 
tinged ochreous. Fore wing with costal fold moderately broad, to before 
middle, costa considerably curved at base, straight posteriorly, apex 
rounded, termen in male gently curved and somewhat oblique, termen in 
female straight above, rounded and somewhat prominent beneath. Snow- 
white, apex with a black dot reaching along costa to base of vein 8 or 9, 
with a large dentation on vein 6, a terminal row of small black dots on 
veins, not reaching tornus, sometimes confluent into a black terminal 
streak with rounded dentations on veins (almost entirely disappearing in 
worn specimens); black markings preceded and "surrounded by yellow 
suffusion ; same suffusion on base of wing shortly continued along base of 
