September, 1942 
York and Michigan. Additional records for 
this species are as follows. 
ILLINOIS.—ELGIN: Botanical Gardens, March 
20, 1940, B. D. Burks, 1 exuvia; Trout Springs, 
March 7, 1940, Mohr & Burksets ceo eo 
nymphs, 2 exuviae. 
CONNECTICUT.—DANIELSON: March 24791937; 
moti. Ross, 26, 39. 
MARYLAND.—KEYSER RIDGE: Aprile 991938. 
H. H. Ross, 49 ; Dec. 30, 1934), H. Prison 
& H. H. Ross, 12 nymphs. 
MICHIGAN.—ONTONAGON County, Shore of 
Lake Superior between Silver City and Onton- 
agon: May 15, 1935, J. W. Leonard, ¢ é, 
92. CRAWFORD County, Au Sable River: 
March 20, 21 and 23, 1936, J. W. Leonard, 
ac, 89. 
NEW YorK.—CLINTON: March Pee 03 
36. Pompey CENTER: April 11, 193 7anr: 0H, 
Ross, 19. East WINFIELD: April 711, 11937, 
H. H. Ross, 12. DEANsBURG: April 11, 1937, 
mH: Ross, 33. 
NorTH CaroLinA.—Near Grandfather Moun- 
tain, west of BLowinc Rock: March 23, 1940, 
eH. Frison et al.. 34,29. 
OHIO.—BLACKLICK: Nov. 5, 092 Gea eS: 
Roach, 4 nymphs. Hocking County: March 
22, 1938, D. J. & J. N. Knull, 19. 
ONTARIO.—GLEN Major: April 7, Ue ey ae 
Betde, 16,19. 
PENNSYLVANIA. — EBENSBURG: March 23; 
1937, H. H. Ross, 12, 6 nymphs. RIveRsIDE: 
March 22-28, 1937, H. H. Ross, 34, 39. 
QuEBEC. —- LAURENTIDES NATIONAL PARK, 
Long Lake: June 20, 1938, C. Gauthier, 19. 
TENNESSEE.—GREAT SMOKY MounrTaIns Na- 
TIONAL PARK, Greenbrier Cove: March £5: 
ee, A. C, Cole, 29. 
VIRGINIA.—GorE: March 17, CE ea 8 
Frison et al., 39. STANDARDSVILLE: March Ze 
1940, T. H. Frison et al., 19. SPERRYVILLE: 
March 17, 1940, T. H. Frison et Gao on 5 2 
ELKTON, Elk Run: March 7 tel MEE Nhe 2 RS 8 
Frison et al., 36, 29, exuviae. SKYLINE 
Drive, Big Meadows: March Tert941 BoD: 
Burks, 73,29. 
WEsT VIRGINIA.—ERWIN, Wolf Creek and 
tributary of Cheat River: Ou ye Caen SANE 
Mees 2d, 19. Auvcusta; Little Cacapon 
River: 1g, 39. Evansvitte: 2 Sue 2 MAq 
COMBER, Cheat River: 64, 929, exuviae. 
FELLOWSVILLE: 34, 9 2, 1 nymph. All col- 
: March 16 and 17, 1940, by T. H. Frison 
Cena. 
WISCONSIN. — SPOONER, Namakagon River: 
April 29, 1939, T. H. Frison & B. D. Burks, 
i Way 
Allocapnia Claassen 
Since my paper on Illinois stoneflies 
(1935a), another species of this genus has 
een found in Illinois, and the study of 
reviously overlooked  typic specimens 
nakes necessary some nomenclatorial 
hanges. These changes and additional 
lotes, new descriptions and comments are 
ncluded in the following discussions of 
arious species of Allocapnia. 
Frison: Nort AMERICAN PLECOPTERA 
265 
Allocapnia vivipara (Claassen ) 
Capnella vivipara Claassen (1924, p. 46). 
Original description, ¢, 9. 
Capnia minima ? Walsh (1862, p. 367). 
New synonymy. 
Discovery of a specimen of Allocapnia 
in the collection of the Academy of Nat- 
ural Sciences of Philadelphia unquestion- 
ably labeled as “Capnia minima ? New- 
port” by Walsh (1862) confirms my sup- 
position (19352) that this record referred 
to a species of Allocapnia. The tip of the 
abdomen of this specimen is missing so 
that it cannot be named to species, but 
since Walsh referred to 4 species with 
rudimentary wings, my original placement 
(1935a) of this record under vivipara 
now seems conclusive. 
To date, vivipara has been recorded from 
the states of Illinois, Missouri, New York and 
Ohio (Frison 1935a). I now have many ad- 
ditional records of this species from the states 
of Indiana, Iowa, Kansas, Kentucky, Okla- 
homa, Pennsylvania, Tennessee, Virginia and 
West Virginia. Evidently this species is widely 
distributed throughout eastern and central 
North America. 
Allocapnia pygmaea ( Burmeister ) 
Semblis pygmaca Burmeister (1839, p. 874), 
Original description. 
Perla nivicola Fitch (1847, p. 278). 
inal description, ¢, 9. In part. 
Capnella pygmaea Needham & Claassen 
(1925, p. 277). Redescribed. 
Allocapnia torontonensis Ricker (1935) 9p, 
257). New synonymy. 
Orig- 
In two of my papers dealing with I]li- 
nois stoneflies (1929 and 19352), one spe- 
cies of Allocapnia, very abundant in south- 
ern Illinois, has been referred to under the 
name of pygmaea (Burmeister), and its 
identification as this species was at one 
time checked by Claassen. Since then it 
has become quite evident to me that two 
species have been confused under the name 
pygmaea and that, due to the erroneous 
assignment of certain Illinois material to 
pygmaea, Ricker (1935b) was wrongly 
influenced by me to describe some Ontario 
specimens of Allocapnia as a new species 
by the name of torontonensis. 
A restudy of material identified as pyg- 
maea by Claassen and the redescription of 
this species by Needham & Claassen 
(1925) convince me that pygmaea, a spe- 
cies with a long-headed supra-anal process, 
fig. 33, is identical with torontonensis. 
The Needham & Claassen (1925) concept 
