460 
NORTH AMERICAN PLECOPTERA 
border of the segment, tip more or less conspicuously notched, the middle area 
dark brown, chitinous, sides, pale, membranous. The lamina is not separate 
from the eighth segment, but is formed by deep lateral folds of the segment 
and its tip is continuous with the border of the segment (fig. 29). 
Four males, one from Selkirk Mountains, British Columbia 
(Bradley), VIII, 13, 1905; one (short-winged) from Colorado, 
and two with no data, but probably from Colorado. . 
Eight females, two taken with the male in the Selkirk Moun- 
tains; one from Yellowstone Park, Wyoming; two from Manitou, 
Colorado, VI, 3, 1879 (111. State Lab. Collection) and three with 
no locality label (Acad. Nat. Sci. Phila.). 
The type specimen of this species is in the Museum of Com- 
parative Zoology, Cambridge, Mass. 
Nymph unknown. 
Pteronarcella badia Hagen 
Adult 
1873. Pteronarcys hadius Hagen, Bull. Geol. Surv. of Col., p. 573. 
1900. Pteronarcella badia Banks, Trans. Amer. Ent. Soc., 26; 242. 
Distribution . — Bridger Basin, Wyoming; Cache Valley, Utah; 
Colorado Mountains. 
9.- — ^Length to tip of wings, 19 mm.; expanse of wdngs, 34 mm. 
Pale brown; anterior part of head yellowish above and below, palpi brown; 
occipital region browmish w'ith paler irregular sculpturings; the lateral anterior 
margins carinated; a square black spot around the ocelli, just behind the 
anterior ocellus, lateral horns extending toward, but not reaching, the carinae; 
carinae blackish; conspicuous round yellow tubercle on either side posterior 
to the lateral horns. 
Prothorax brownish, slightly broader than long, sides straight, anterior and 
posterior margins a trifle convex, front angles square but not sharp, hind 
angles rounded, a yellow spot on the middle of the anterior and posterior 
margins, not connected by a conspicuous line, coarse paler sculpturings on 
the disc. Meso- and metathorax dark brown, varied wdth paler on the venter. 
Tarsi considerably darker than the other segments of the legs. 
Abdomen brown; paler beneath and on the dorso-lateral area of the last 
four or five segments; setae pale. 
Female. The posterior margin of the eighth segment notched on either side 
of the mid-ventral line; the part betw'een the notches chitinized, dark brown,, 
a little produced, but not reaching the border of the segment (fig. 32). 
One unlabelled specimen. 
Hagen’s type specimen is in the Museum of Comparative 
Zoology, Cambridge, Mass. 
Male unknown. 
Nymph unknown. 
