September, 1942 
markings as in fig. 90, corners rounded. 
Abdominal tergites with alternating 
longitudinal stripes of yellow and brown, 
fig. 90. Cerci long, many segmented, seg- 
ments progressively longer from base to 
apex ; a longitudinal row of long, fine setae 
on apical segments in addition to smaller 
spinelike ones encircling apex of each seg- 
ment. 
Mature specimens with a body length, 
exclusive of appendages, up to 14 mm. 
No gills present. 
Since this species has been previously re- 
corded only in the original descriptions already 
noted, I present the following records, which 
show it has a wide northeastern distribution in 
North America. 
MANITOBA.—CHURCHILL: July 5-9, 193 Gye 
E. McClure, 56, 39; July Daal OSG ee be 
McClure, 16. Swan River, Swan River: June 
pee 56, TR McClure, 12, 29, 4 nymphs. 
MICHIGAN.—BALDWIN, Pere Marquette Riv- 
er: May 28, 1939, Frison & Ross, 12; May 9, 
1940, Frison & Ross, 16, 59 with exuviae 
(reared) ; same except May 9-10, @ Een SE Sh. 
nymphs, exuviae; same except May 10, 1¢, 
12 with exuviae (reared). Boardman River, 
3 miles above TRAvERsE City power dam: 
Miareh 7, 1935, J. W. Leonard, nymphs and 
1 exuvia. GERMFASK, Manistique River: May 
11, 1940, Frison & Ross, 4 nymphs. Granp 
TRAVERSE COUNTY, Boardman River: May 7, 
25,0). VV. Leonard, 3-6, 9 2. Honor, Platte 
River: May 27, 1939, Frison & Ross, 3 6, 49, 
2 nymphs with exuviae and 12 with exuvia 
(reared) ; May 10, 1940, Frison & Ross, 24, 
6 nymphs, 1 exuvia. Lake County, Pine 
River: May 14, 1938, O. H. Clark, 19; May 
16, 1938, O. H. Clark, 29; Walker Bridge 
Camp, May 29, 1938, J. W. Leonard, oreo: 
May 30, 1938, O. H. Clark, 19; Walker 
Bridge Camp, at light, May 31, 1938, O. H. 
Clark, 33, 12; June 4, 1998) |e bier c-, 
mee June 11, 1938, R, Love, 19; June 12, 
1938, J. Blue, 39. Luzerne, east branch of 
Big Creek: J. W. Leonard, 1 exuvia. May- 
FIELD, Boardman River: May 28, 1939, Frison 
& Ross, 19. Monrmorency County, Hunt 
Creek: April 14, 1939, J. W. Leonard, 2 
nymphs. Route 46 between MusKEGoN and 
Kent City, tributary of Black Creek: May 
9, 1940, Frison & Ross, 1&4 with exuvia 
(reared), 5 nymphs. NauMa JUNCTION, Stur- 
Zeon River: May 12, 1940, Frison & Ross, 
nymphs; same data except May 15, 29 with 
exuviae (reared); same data except May 17, 
19 (reared) ; same data except May 20, 29 
with exuviae (reared). NIRVANA, Sanborn 
Creek: May 10, 1940, Frison & Ross, 4 nymphs. 
OTsEco County, west branch of Sturgeon Riv- 
er: March 15, 1935, J. W. Leonard, 3 nymphs. 
Peacock, Little Manistee River near town: 
May 10, 1940, Frison & Ross, 3¢, 29, nymphs, 
1 exuvia. Sturgeon River, west branch be- 
tween VANDERBILT and WOLVERINE: March 155 
1935, J. W. Leonard, 1 nymph. ‘THOMPSON, 
creek near town: May 12, 1940, Frison & 
Ross, 2 nymphs. 
Frrson: NortH AMERICAN PLECOPTERA 
a17 
MINNESOTA. — WINONA CouNTY: 
1938, Page Nicholson, 19°. 
ONTARIO.—ALGONQUIN Park, Costello Lake, 
Ontario Fisheries Research Laboratory: June 
14, 1938, W. M. Sprules, 12. Kenora: June 
16, 1908, 19. 
WISCONSIN.—BOULDER JUNCTION: Trout Riv- 
er, July 3-4, 1933, Frison & Mohr, exuviae: 
Trout River, June 20, 1934, Frison & Mohr, 
4 exuviae; Trout River, April 8-9, 1937, 
Frison & Mohr, 1 nymph; May 6-17, 1937, 
Frison & Mohr, 5 nymphs; May 7-17, EW 
Frison & Mohr, 124, 1592 (reared) ; May 20, 
1937, Frison & Mohr, 2 nymphs. SPOONER, 
Namakagon River: June 6, 1936, Frison & 
Ross, 2 exuviae. 
May 20, 
Isoperla fusca Needham & Claassen 
Isoperla fusca Needham & Claassen 
p. 146). Original description, ¢, 9. 
(1925, 
Specimens of this species, recorded only 
once (Neave 1929) since it was first de- 
scribed from specimens collected at Water- 
ton Lakes, Alberta, Canada, were found 
Fig. 92—Nymph of Isoperla fusca. 
