Genera and Species of Exotic Trichoptera. 267 
wings shining, with very short and slight pubescence, narrow, the 
apex elliptical; neuration fine; two oblique transverse veins 
uniting the costa and subcosta, one before the middle of the 
costa, and another near the termination of the subcosta; discoidal 
cell open; celiula thyridii small, closed by a transverse vein ; 
another transverse vein at the base of this cell, and yet another 
below it towards the base of the wing; apical forks 1, 2, 3, 4 and 
5 all present, fork 5 rudimentary. Posterior wings much shorter 
and broader than the anterior ; anal portion well developed; cos- 
tal margin excised before the apex; no discoidal cell; apical 
forks 2, 3 and 5 present, fork 3 very small. Legs slender. Spurs 
2-4-4; anterior tibize with two minute apical spurs; intermediate 
with two pairs of long and very unequal apical spurs ; posterior 
tibiae with two pairs of long and nearly equal spurs. Abdomen 
short and-stout; inferior appendices long and slender. 
‘There is not any described genus of Hydropsychide which 
approaches this, either in general form, or in the arrangement of 
the nervures; the open discoidal cell of the anterior wings is 
peculiar, as it is generally closed in this family. 
1. Leptopsyche gracilis, n. sp.” (Pl. XIX. fig. 8.) 
L. antennis fusco-ochraceis, ad basim ochraceis ; capite, palpis 
thoraceque ochraceis; oculis nigris; alis anticis nitente- 
flavis ; posticis flavo-hyalinis, iridescentibus, venis flavo- 
ochraceis; pedibus flavo-albidis, tarsis ochraceis ; abdomine 
ochraceo ; appendicibus superioribus parvis, quadratis; in- 
ferioribus longis, gracilibus, sursum incurvatis, forsitan bisar- 
ticulatis. (¢.) 
Long. antenn. 19 lin. ; corp. 4 lin. ; exp. alar. 13 lin, 
Habitat in insula Dorey (Wallace). 
In Mus. Saundersiano. 
Antennz ochraceous, somewhat fuscous, at the base wholly 
ochraceous. Head, palpi and thorax ochreous. Anterior wings 
shining, semi-transparent, yellow, the apex slightly brownish- 
ochreous. Posterior wings hyaline, tinged with yellowish, beau- 
tifully iridescent ; neuration yellowish-ochreous. Legs pale yel- 
lowish ; all the tarsi ochreous. Abdomen ochreous; superior 
appendices very small, quadrate; inferior appendices long and 
slender, curved upwards and approximating at the tips, apparently 
bisarticulate, but the first joint is short and nearly concealed ; 
penis thick, 
