18 
Psyche 
[Mar. 
portion bears several large and small setae. iEdeagus 
with apical portion semi-membranous, trilobed from lat- 
eral view, two prominant spines internally, fig. 2B. 
Female. — Length 6.5-8 mm. Very similar in general 
characteristics to male. Genitalia as in fig. 2C. 
Holotype. Male. — Albany County, Wyoming, Little 
Laramie River, August 1, 1947 (R. E. Pfadt). 
Allotype. Female. — Same data as for holotype. 
Paratypes. — 17 males, 21 females, same data as for 
holotype. 
Ecclisomyia maculosa Banks 
Originally described from Colorado ; very little is known 
of the distribution of this characteristically western 
species. 
Male. — Length 9 mm. Wings light brown, rather con- 
spicuously irrorate with white markings. Legs a trifle 
lighter brown than wings, spines black, spurs luteous. 
Genitalia as in fig. 3 and 3A. 
Female. — Genitalia as in fig. 3B. General character- 
istics very similar to male. Cercus, from lateral aspect, 
short and stocky, apex blunt ; from dorsal aspect Y-shaped 
incision extends nearly to base ; cerci form a tubular struc- 
ture with basal portion fused to dorsal portion of tenth 
segment. Dorsal portion of tenth segment very thin, 
spatulate, deeply incised, lateral portion also very thin 
and extending to subgenital plate. Subgenital plate seen 
from ventral aspect truncate, short and wide, reaching 
caudad almost to distal margin of dorsal portion of tenth 
segment. 
This species was collected at an elevation of approxi- 
mately 10,700 feet, along a shallow, narrow swift flowing 
mountain stream. The majority of the specimens col- 
lected were found resting on the banks of the stream, 
often only an inch or so above the water. 
Wyoming: Albany County, Snowy Range Mountains, 
July 26, 1947 (D. G. Denning) ; 19 males, 3 females. 
Limnephilus utahensis n. sp. 
This species is closely related to occidentalis Banks and 
labus Ross. It can easily be differentiated from these 
