68 
MICROLERIDOPTERA OF NEW GUINEA 
Proterocosma Meyrick, 1886 
Proterocosma Meyrick, 1886, Trans. Ent. Soc. Lond., 1886, p. 293. Fletcher, 
Mem. Agric. Ind., Ent., vol. 11, p. 187, 1929. 
Key to the Papuan species of Proterocosma 
1. White costal and dorsal streaks marginata spec. nov. 
White dorsal streak only dualis spec. nov. 
Proterocosma marginata spec. nov. (fig. 617) 
12 mm. Head, antenna creamy-white, scape below dark fuscous- 
bronze. Palpus creamy, median segment dark fuscous except the apex, 
terminal segment with the extreme tip and the lower edge along its 
apical 2 / 3 , dark fuscous-bronze. Thorax creamy, tegula dark bronze- 
brown. Abdomen fuscous-grey, subapical segment whitish, apical tuft 
ochreous-whitish, venter pale grey. Legs fuscous-whitish, anterior and 
median tibia with two oblique fuscous stripes. Fore wing lanceolate, rather 
narrow. Deep brown-fuscous-bronze, markings creamy-white. A longi- 
tudinal streak occupying less than the costal fourth of the wing breadth, 
reaching from well beyond the base to beyond °/ 6 , extremities rather 
abruptly attenuated, anterior acute, posterior less distinctly so; this 
streak cut by two lines of dark ground colour along the basal halves of 
the veins 11 and 10, and containing a moderate irregular horizontal 
streak of the ground colour just below the costa well beyond the middle, 
and a second shorter similar streak along the posterior part of vein 10; 
two very small white oblique costal marks between the end of the streak 
and the' apex of the wing; a similar slightly broader dorsal streak from 
just beyond the base to before the apex, with the upper edge faintly 
undulate posteriorly, and with a small semioval impression beyond the 
middle; a moderate horizontal streak of the ground colour penetrating 
into the white streak from above and strongly narrowing it before the 
apex ; a faint fuscous subdorsal suffusion before the preceding. Cilia creamy, 
black opposite the apex, pale grey along the dorsum. Hind wing and 
cilia pale grey. 
Tegumen strong, concave. Uncus with a short bluntly pointed pro- 
jection. Valva cardinate, narrow, posterior half shaped as a hooked 
narrow process, ventral angulation of which is set with short rather thick 
spikes. Anellus process long, slender, clavate, top narrowed, slightly 
curved. Aedoeagus bent, gradually narrowed, rather slender. (Slide no. 
1067 D, type.) 
Iebele Camp, 2250 m, December 2, 1938. One specimen. 
