84 Mc LACHLAN, NEUROPTERA. 
Trichoptera. 
Fam. Limnophilide. 
Chilostigma preteritum, Walker (Mc Lach., Revision and 
Synopsis, Supplement p. xlii). — Five tubes contain this species, 
all. from the »winter station» (Pitlekaj & vicinity), JulyEero 
about 30 examples in all; of both sexes. 
This species was originally discovered by Sir John Ri- 
chardson in the district of the Slave and MacKenzie Rivers, 
Arctic America. Recently Dr J. Sahlberg found a & at Ni- 
kandrow Island, Yenissei, Sibiria. No doubt the species is cir- 
cumpolar. | 
I do not find that the small nervule connecting the sub- 
costa and radius near the end (Cf. Revision & Synopsis, Suppl., 
p. xliii) is constantly present in the »Vega» examples. 
Fam. Sericostomatid&. 
Micrasema scissum sp. nov. — Nearly 30 examples (of 
which only one is a 2?) of a Micrasema were found at St. Law- 
rence Island, Behring Straits om August 2005 fv nsteer 
tainly undeseribed, and I append a description. 
Black: head, basal joint of antenn&e, and apical portion of 
abdomen clothed with greyish-yellow hairs. Antenne&e uniformly 
blackish-fuscous. Palpi fuscous: maxillary pair in the s rather 
short, upcurved, the second and third joints nearly equal. Legs 
blackish-fuscous, the tarsi with a testaceous tinge. Abdomen 
blackish, with grey Jlateral lines. Wings somewhat elongate, 
pale-grey with short yellowish pubescence; pterostigmatic region 
darker and more opaque in the anterior wings; neuration fusces- 
cent: in the anterior wings the discoidal cell is elongate and 
narrow; 1" apical fork very oblique at its base, 2"! apical fork 
with a long footstalk,;, 3! apical fork sessile or neanlyrtsos 
nervule closing the discoidal cell in an oblique line with that 
below it. 
In the & the 9" dorsal segment is narrow, produced into 
a small median triangle; below it is the »dorsal lobe> which 
is divided nearly to its base into two stout slightly-curved 
obtuse finger-shaped processes. Intermediate appendages (?) tes- 
