MICROLEPID OPTERA OE NEW GUINEA 
165 
Ocellus posterior. Proboscis developed. Antenna moderately ciliated in 
male, pubescent in female, scape moderate. Palpus rather short, porrect; 
median segment clothed with appressed, rather short scales, slightly 
projecting towards apex above and beneath ; terminal segment short, 
pointed. Thorax without crest. Fore wing without costal fold, smoothly 
scaled, vein 2 from slightly beyond middle, 3 from half way between vein 
2 and angle, 4 from angle, 5 scarcely approximated towards base, 7 and 8 
stalked, stalk over 1 / 2 , 7 to termen, 1 1 from before middle of cell, which is 
not curved posteriorly. Hind wing without cubital pecten, 2 from about 
middle, 3 nearer to 4 than to 2, 4 from angle, 5 slightly and gradually 
converging with 4 towards base, hardly curved, 6 and 7 connate or short- 
stalked. 
Genitalia typically cacoeciine. Tegumen broad and short, uncus narrow, 
hook-shaped, with dilated and truncate top, socius small, narrow, 
drooping, gnathos very strong, H-shaped, with short top and long lateral 
pending projections (which is a development of the gnathos in Adoxophyes) 
Valva and sacculus rather small, simple. Transtilla with lateral dentate 
knobs, peniculus present. Aedoeagus very short, slightly curved. Ostium 
simple, colliculum present, cestum absent, bursa cop ulatrix elongate, 
signum very small. 
Nearest to Adoxophyes Meyrick, 1910, differing by the absence of the 
costal fold in male, by the almost parallel vein 5 in hind wing, and also 
by markings, quite unusual in Cacoeciini. The species must have acquired 
diurnal habits together with their conspicuous colouring. 
Key to the species of Ghresmarcha 
1. Snow-white, apical third of wing orange-fulvous, separated by black streak, 
marked with metallic dots enaemargyrea spec. nov. 
White with black marginal markings 2 
2. Hind wing yellowish-white, a grey streak along termen. . delphica Meyrick 
Hind wing dark grey sibyllina Meyrick 
Chresmarcha sibyllina Meyrick, 1910 (figs. 204, 205) 
Ghresmarcha sibyllina Meyrick, 1910, Proc. Linn. Soc. N.S. Wales, vol. 35, p. 
220, No. 15. Lep. Catal., fasc. 10, p. 16, 1912. Gener. Ins., fasc. 149, p. 21, pi. 1, 
fi<n 1, 1913. Diakonoff, Zool. Meded. Mus. Leiden, vol. 21, pp. 135, 136, 138, 
figs. 1 I— J, 3 E— F, 1939. Treubia, vol. 18, p. 31, 1941; ibidem, vol. hors s6rie, 
pp. 34-35, 1944. 
Distribution: British New Guinea, Owgarra. 
$ 23 mm (allotype). Head pale orange-ochreous, face narrowly edged 
with black. Palpus light orange-ochreous, terminal segment black. Antenna 
black, scape mixed with pale ochreous. Thorax whitish, tinged pale 
orange-ochreous anteriorly. Abdomen dark grey, anal scaling roughish, 
dark grey, ovipositor deep orange. Legs dark grey. Fore wing broad, 
truncate, strongly dilated, costa strongly rounded throughout, apex 
rounded, termen straight above, rounded beneath, little oblique. Snow- 
