146 
MICROLEPID OPTERA OP NEW GUINEA 
fuscous, with both edges dotted with blackish and serrate; this fascia 
followed by a pair of grey preterminal transverse strigulae; terminal edge 
grey; dorsum suffused with dark greyish -fuscous. Cilia pale fulvous- 
ochreous, mixed with dark grey, an antemedian line, and a patch in tornus, 
dark grey. Hind wing pale ochreous, somewhat suffused with brownish 
towards apex, faintly marbled with fuscous. Cilia pale whitish-ochreous. 
Limen broad, upper margin twice excavate, lower margin with rounded 
angles. Ostium funnel-shaped, Colliculum moderate, rather narrow. Ductus 
bursae moderately long, coiled, cestum absent. Signum narrow, curved, 
acute; capitulum, a rounded plate (Slide No. 465 D). 
Moss Forest Camp, five km northeast of Lake Habbema, 2800 m, 
October 17, 1938. One specimen. 
Isochorista Meyrick, 1881 
Isochorista Meyrick, 1881, Proc. Linn. Soc. N.S. Wales, vol. 6, p. 424; ibidem, 
vol 35, p. 165, 1910. Lepid. Catal., fasc. 10, p. 1, 1910. Gener. Ins., fasc. 149, p. 8, 
1913. Fernald, Gener. Tortr. Typ., pp. 42, 60, 1908. Fletcher, Mem. Agr. Ind., 
Ent., vol. 11. p. 119, 1929. Diakonoff, Zool. Meded. Mus. Leiden, vol. 121, PP- 
119, 186-188, figs. 5G (head), F (neur.), 6A— D (gen. d), 7.J-K (gen. $). 
Key to the Papuan species of Isochorista 
1. Basal patch and costal patch well-defined, dark fuscous . sulcata spec. nov. 
Basal patch, if defined, only on costal half, costal patch rather indefinite, or 
absent * 
2. Costal half of wing with discernible markings .... polysperma spec. nov. 
Markings altogether absent papuana spec. nov. 
Isochorista papuana spec. nov. (fig. 185) 
0 19 mm. Head and palpus dark fuscous, Antenna whitish, ringed with 
dark fuscous. Thorax fuscous ? (damaged). Abdomen ochreous-grey, anal 
tuft pale ochreous. Legs ochreous-fusoous, tarsi pale-ringed, posterior pale 
ochreous. Fore wing elongate-subovate, moderately broad, costa strongly 
curved anteriorly, straight posteriorly, apex rather acute, slightly pro- 
jecting, termen concave above, rounded beneath, considerably oblique. 
Evenly light greyish -fuscous, somewhat darker along costa posteriorly, 
scattered with a few' blackish scales in disc ; cilia pale greyish-ochreous. 
Hind wing pale greyish, paler towards base, sparsely dotted with darker 
grey towards apex, cilia pale greyish, a darker antemedian shade, becoming 
broader and more distinct along dorsum. 
Limen rather broad, lower edge gradually rounded, upper edge excavate 
in middle, minutely ciliatc. Colliculum small (in figure visible inside 
ostium). Ductus bursae short, bursa copulatrix elongate. Signum little 
curved, slender, acute (Slide No. 455 D). 
Baliem Camp, 1700 m, November 16—27, 1938. One specimen. Some- 
what damaged, but sufficiently defined by the genitalia. This and the 
following two species are the first representatives of the genus that become 
known outside Australia. 
