MICROLEPIDOPTERA OF NEW GUINEA 
15 
three broad black dorsal scales: before, below and beyond white spot, a 
tuft of black scales in dorsal cilia at 3 / 4 , a smaller tuft opposite this in 
costal, and a minute tuft in apical cilia. 
Tegumen conical. Uncus sickle-shaped, pointed. Valva long, narrow, 
sacculus haired along edge; harpe, a small dentoid chitinisation ; cucullus 
with a median haired ridge. Aedoeagus moderate, narrowed, curved. 
Furca moderate, paired, each part dilated towards base. Juxta, a rounded 
plate, upper edge erected in a point. Vinculum small, rounded, emarginate 
in middle. (Slide No. 906 D, type.) 
Araucaria Camp, 800 m, March 28, 1939. One specimen. 
Platyptilia Hubner, 1826 
Platyptilia Hubner, 1826, Verz. bek. Schmett., p. 429; etc. 
Key to the Papuan species 
1. Dorsal cilia of third segment in hind wing with an irregular series of black scales 
from base to just beyond middle phanerozona spec. nov. 
Dorsal cilia of third segment in hind wing without any black scales or scale- 
tufts along basal half of that segment 2 
2. Dorsal cilia of third segment in hind wing with a strong triangular black scale- 
tuft beyond middle of that segment, no black scales between this and apex of 
segment archimedon Meyrick 
Dorsal cilia of third segment in hind wing not thus scaled 3 
3. Dorsal cilia of third segment in hind wing with a strong black bar before apex 
and a few black scales from this to apex of segment monotrigona spec. nov. 
Cilia of third segment in hind wing entirely mixed with black scales along apical 
third of that segment enargota Durrant 
Platyptilia monotrigona spec. nov. 
povo = one, Toiymvov = triangle 
d 20 mm. Head, thorax pale ochreous mixed with fuscous, apex of latter 
suffused with dark fuscous, pectus yellowish-white. Antenna blackish- 
fuscous, base pale ochreous. Palpus pale fuscous, median segment suffused 
with dark fuscous laterally, roughly expanded towards apex, terminal 
segment pointed. Abdomen fuscous, dark fuscous above, towards base 
with a short whitish pleural streak (posterior part of abdomen missing). 
Legs pale fuscous, slightly irrorated with darker fuscous, anterior femur 
and other segments of anterior leg above dark fuscous, tarsal segments 
of this leg with narrow whitish basal rings; posterior leg pale fuscous, 
tibia with basal fourth white, tinged with yellowish, a cloudy suffused 
ring opposite, and around base of both pairs of spurs, spurs fuscous, with 
a subapical fuscous-whitish ring; posterior tarsus fuscous, basal half of 
segments whitish. Fore wing cleft from beyond 2 / 3 , termen of first segment 
rounded, tornus rounded-prominent, termen of second segment rounded, 
projecting above middle, tornus rounded. Fuscous-whitish, suffused with 
