September, 1942 
NorTH CAROLINA.—Small stream near NEW- 
FOUND GAP, 3,560 feet elevation: May 28, 
1934, T. H. Frison, 1 nymph. SMOKEMONT, 
Oconaluftee River: May 28, 1934, T. H. 
Frison, 2 exuviae. Macon County, Nantahala 
River: May 30, 1939, T. Howell, 1 nymph. 
TENNESSEE.—GATLINBURG: June 13, 1940, T. 
H. Frison et al., 1 nymph, 6 exuviae. 
% 
+ 
ae m ak i 
bs, 
Fig. 81—Nymph of Difloperla bulbosa. 
This new species is close to the complex 
of species typified by Diploperla hastata 
(Banks). It differs from hastata in the 
male in the shape of the supra-anal process 
and the lack of lateral stylets or para- 
genital plates and in the female in the 
shape of the subgenital plate. The nymph 
is apt to be confused with the nymph of 
hastata, but the large light-colored areas 
on the abdominal tergites present in this 
new species are lacking in hastata. 
Frison: NorrH AMERICAN PLECOPTERA 309 
Diploperla arina new species 
Mave. — General color yellow and 
brown. Head and pronotum with brown 
and yellow areas forming a color pattern 
as in fig. 82. Legs yellow with brown 
markings; antennae and anal cerci yel- 
lowish brown. No gill remnants. 
Head wider through compound eyes 
than width of pronotum; lateral ocelli 
slightly more removed from one another 
than from anterior ocellus, distance be- 
tween them about the same as each is 
distant from inner margin of adjacent 
compound eye. 
Pronotum approximately quadrangular, 
NymMPeHAL MANDIBLES 
Ny MPHAL 
MAXILLA 
NymMPHAL LaBium 
o TERMINAL ABDOMINAL 
TERGITES 
9 TERMINAL 
ABDOMINAL 
STERNITES 
o' HEAD AND PrRonotum 
Fig. 82.—Diploperla arina. 
