September, 1942 
» 
doubt other states. Critical comparative 
studies of eastern and western material 
have failed to reveal any significant char- 
_ acters for the separation of eastern speci- 
mens from western specimens. With re- 
_ spect to variation in the size of the lobes on 
_ the posterior margin of the tenth abdomi- 
nal tergite, the eastern specimens are of the 
small type. A similar instance of a species 
_ of taeniopterygid occurring in both eastern 
and western parts of the United States has 
been recorded for Taeniopteryx maura 
@eictet) under the name of nivalis 
(Fitch) by Frison (1942). 
Records for pacifica from eastern North 
America, based upon material in the Illinois 
Natural History Survey collection or examined 
by me, are as follows. 
MARYLAND.—PINEY Grove: 
Bei. Ross, 14. 
NEw HAMPSHIRE.—MounT WASHINGTON: 
Brook near Pinkham Notch Camp, June 22, 
1941, Frison & Ross, iby ny ey AE 
NEw Yorxk.—Mounr TREMPER, Esopus 
Creek: “April 27, P72 omir. sjennings 1, 
PHOENECIA: May 5, T2407 ee Pennings arled:. 
392. SCHOHARIE: ex trout stomach, April, 1937, 
P. Jennings, 2 nymphs; IVlayo 5, 71937, Pi jen- 
nings, 1¢; May 28, 1937, "block, VO. April 
ie 38, P. Jennings, 16, 29 : ex trout stom- 
ach, April, 1940, P. Pennings-calwme 2 = 
nymphs. 
NorTH CaroLtna.—BLowinc Rock: March 
23, 1940, Frison, Mohr & Hawkins, 19, 2 
exuviae; near Grandfather Mountain, west of 
town, March 23, 1940, Frison, Mohr & Haw- 
kins, 3 nymphs. WILLeTs: March 23, 1940, 
Frison, Mohr & Hawkins, 1¢, 29. 
TENNESSEE.—GATLINBURG: March 24, 1940, 
Frison, Mohr & Hawkins, 46, 5 exuviae. 
GREENBRIER CovE: March 15, 1938, 2,000 feet 
elevation, Smoky Mountains, A. C. Cole, 19. 
VIRGINIA.—SPEEDWELL: March 22521940, 
Frison, Mohr & Hawkins, 19, 2 exuviae. 
oo: March 17, 1940, Frison & Mohr, 
PARTI) e103 Se 
Brachyptera vanduzee (Claassen ) 
Taeniopteryx vanduzee Claassen (19370.-D. 
46). Original description, ¢. 
_ I have studied the type of this species 
in the collection of Cornell University, 
through the kindness of Professor J. 
Chester Bradley, and find vanduzee to be 
a distinct and valid species. It differs from 
all other western species of the genus in 
the presence of a lobe on the ninth ab- 
dominal sternite. The genitalic structures 
are complicated, and, since the illustration 
given by Claassen (1937) is rather in- 
distinct, I present fig. 13 of the type show- 
ing in greater detail important features of 
this species, 
Frison: NorrH AMERICAN PLECOPTERA 
Brachyptera 
vanduzee. 
CO ABDOMINAL STERNITE= 
The type was collected at “Tahoe, Cali- 
fornia.” Additional specimens of this spe- 
cies have not been seen or recorded by 
other entomologists. 
Brachyptera contorta 
(Needham & Claassen) 
Taentopteryx contorta Needham & Claassen 
(1925, p. 242). Original description, ¢. 
This species has not been recorded in 
literature since it was described from a 
single male from “Jaffery, N. H., March 
18, C. W. Johnson” in the collection of 
Cornell University. Since the female and 
nymph have not been described, I present 
brief descriptions of their most important 
characters as follows. 
FEMALE.—In general similar to the 
male as described by Needham & Claassen 
(1925). Coxae without small, round, 
membranous areas on ventral surfaces 
(evidence of lack of tracheal coxal gills 
in nymph). Venation of wings as in fig. 
14. Ninth abdominal sternite produced in- 
to broad, rounded plate shaped as in fig. 
14. 
Allotype, female——East Hampton, Lyman’s 
Brook, Conn.: March 24, 1937, H. H. Ross. 
Taken at same time and place as males of the 
same species. 
