4 Psyche [March 
light. No. 11748. Lectoallotype, female. — Same data, but 
August 18. 
The genitalia of a homotype are shown in fig. 2. 
Mystrophora lividum (Hagen), 1861, p. 295 (T inodes) . 
Lectotype, female. — St. Lawrence River, Canada, Osten 
Sacken. No. 11081. 
Milne has determined the male of this species as that 
illustrated by Betten as Mystrophora sp. (1934, pi. 9, figs. 
15-17). 
Mystrophora nigrior (Banks), 1911, p. 355, fig. 23. 
( Glossosoma ) 
Lectotype, male. — Black Mountain, North Carolina, north 
fork Swannanoa River, May. No. 11745. Lectoallotype, 
female . — Same data. 
At present there appear to be two valid species in this 
genus, the two illustrated by Betten (1934) as americana 
and Mystrophora sp. No good characters have been dis- 
covered as yet which separate the females of the two species, 
so that the exact status of the names americana Banks and 
lividum Hagen is problematic. It seems best at present to 
consider as nigrior the species treated as americana by most 
authors and illustrated by Betten (1934, pi. 8, figs. 4-6 and 
pi. 9, figs. 1-14) , and to consider americana as an unidentified 
species. 
Protoptila maculata (Hagen), 1861, p. 296. ( Baerea ?) 
Lectotype, male. — St. Lawrence River, Canada, 1859, 
Sacken. No. 11093. Lectoallotype, female . — Same data. 
This species has been illustrated by both Banks and Betten 
(1934). 
Rhyacophila acropedes Banks, 1914, p. 201, fig. 39. 
Lectotype, male. — Deer creek, Provo Canon, Utah, Au- 
gust 21, Spalding. No. 11741. 
This species is closely allied to coloradensis Banks, but 
differs in details of the male genitalia, fig. 6. 
Rhyacophila atrata Banks, 1911, p. 351. 
Lectotype, male. — Black Mountain, North Carolina, north 
fork Swannanoa River, May. No. 11739. Lectoallotype, 
female. — Same data. 
The genitalia of the type are shown in fig. 3. 
