40 
MICROLEPID OPTERA OF NEW GUINEA 
9 from angle, 10 remote, 11 from about 1 / 3 of cell, which is triangularly 
dilated posteriorly, discoidal vein convex, no accessory cell. Hind wing 
i/ 2 — 3 / 4 (in genotype 2 / 3 ), semiovate, broadest beyond middle, apex bluntly 
pointed, cilia 4 / 5 ; 2 from 2 / 3 , 3 and 4 connate from angle, 5 remote, median, 
6 and 7 separate, more or less approximated at base, 7 to apex, cell strongly 
triangularly dilated posteriorly, discoidal outwardly oblique, no parting 
vein, 8 rather strong, remote, straight, to 4 / 5 of costa. 
Tegumen elongate. Uncus very small, triangular. Gnathos broad short, 
obtuse, top serrulate. Transtilla absent. Valva moderate, costa ending in a 
curved acute hook, cucullus either ill-defined or well-developed. Anellus 
with hairy lobes. Saccus sometimes developed. Aedoeagus rather slender, 
moderately curved, long. Cornuti, long arrows. 
Ovipositor bilobed, pointed, erectile. Ostium simple. Limen, colliculum, 
sometimes developed. Ductus bursae long, coiled, simple. Bursa copulatrix 
ovoid. Signum, one transverse slender rod. 
Genotype Iriania mystica spec, nov., male. 
This puzzling genus, when studied superficially, might be attributed 
to the Oecophoridae, as the neuration of the both fore and hind wings 
very much approaches that of the genera Parocystola, Tachystola, Coesyra, 
or Ghambersia, however, with the exception of two important characters, 
viz. the simple vein lb and the origin of vein 1 1 (from 4 / 3 ) in the fore wing. 
Besides, flattened smooth head and rather short diverging labial palpi 
have little in common with that family. In our opinion Iriania can best 
be placed in Yponomeutidae, pending further evidence. The rather uni- 
formous small species remind of Scythris, but have broader fore wings; 
the breadth of hind wings varies specifically from 4 / 2 to s / 4 . 
Key to the species of Iriania 
1 . 
2 . 
3. 
4. 
5. 
6 . 
Apex and sometimes termen as far as one fourth of wing light orange-yellow 
„ lutescens spec. nov. 
Apex and termen brown or fuscous, sometimes with light yellow markings 2 
With bright yellow markings which are sometimes suffused, but always distinctly 
lighter than ground colour 3 
Markings formed by sparse ochreous irroration, very distinct 6 
Without distinct transverse fasciae; posterior half of wing irregularly irrorated 
with yellow ochlodes spec. nov. 
One or more transverse yellow fasciae distinct 4 
One antemedian transverse fascia, a suffusion on basal half of dorsum, a costal 
dot at 8 / 4 • • • • - minor spec. nov. 
Three or four transverse fasciae 5 
Three bright yellow transverse fasciae tricosma spec. nov. 
Four deep yellow transverse fasciae auriflua spec. nov. 
Face pale yellow anisoptera spec. nov. 
Face fuscous mystica spec. nov. 
