NEW AND LITTLE KNOWN SPECIES OF 
NEABCTIC TEICHOPTEEA 
By D. G. Denning 
University of Wyoming, Laramie, Wyoming 
Examination of additional caddis fly material from 
western United States lias resulted in the recognition of 
several new and little known species. Descriptions of 
five of the new species appear in this paper. Unless other- 
wise stated the types of the new species are in the writers 
collection at the University of Wyoming. I would like 
to express my thanks to Dr. L. J. Milne who made avail- 
able one of his holotypes for comparison with a species 
illustrated herein. 
Leptocella aeolius n. sp. 
This is an interesting species which can readily be dif- 
ferentiated from other described Nearctic Leptocella by 
the fuscous colored wings. The clasper and tenth tergite 
are also markedly different from other described species. 
This species was collected from a clear, cold, rapidly 
flowing mountain stream at approximately 7,500 feet ele- 
vation. 
Male. — Forewing length 10 mm. General color of 
forewings and hindwings reddish brown, considerably 
brighter toward apex, a series of transverse whitish spots 
from stigma to apex, fringe along margin near tip of 
anal veins reddish brown, fringe at apex of hind wing 
reddish brown. 
Genitalia as in fig. 1. Ninth segment with dorsum pro- 
duced caudad as a concave dorsal hood, below which arises 
a pair of long finger-like processes ; lateral margin pro- 
duced caudad as a triangular side piece. Tenth tergite 
practically ventrad in position, wide basally, gradually 
acuminate, slightly upturned distally, apices narrowly in- 
cised for a short distance, fig. 1A ; pair of curved filaments 
which arise near base of tergite expanded at apex into a 
slightly convex plate. Clasper with basal flap narrow, 
irregular in outline, neck narrow; mesal lobe subacute 
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