LUCY WRIGHT SMITH 
453 
species were bred in May 15 to 20, 1899, by Mr. G. H. Jensen; 
and in May 14 to 21, 1911, iiy L. W. Smith. 
The type specimen of this species is in the British Museum, 
London. 
Nymph 
Length of body 32 mm.; length of antennae, 15 mm.; length of setae, 6 mm. 
Color dark brown, paler beneath and on all appendages. Antennae of about 
sixty-five segments; the middle third paler, in exuviae this area shows as a 
band of white; the supra-antennal plate, blunt with sharp corners. 
Prothorax slightly widened posteriorly; its anterior margin and sides slightly 
arcuated, the posterior border decidedly convex; sides flaring, produced beyond 
the front and hind margins, forming conspicuous acute angles (fig. 16). 
Segments one to eight of the abdomen with lateral apical hooks; the hooks 
close to the body, the posterior edges not more than half as long as the lateral 
edges, the hooks on segments seven and eight small and inconspicuous. The 
supra-anal plate alike in both sexes, a tapering projection of the last dorsal 
segment (figs. 24 and 25). Setae short, stout, banded with white in the apical 
half but the tip darker. 
Numerous nymphs and exuviae of bred specimens. This 
species was bred in Ma}' 15 to 20, 1899, by Mr. G. H. Jensen, 
and in May 14 to 21, 1911, by myself. 
Pteronarcys biloba Newman 
Adult 
1838. Pteronarcys biloba Newman, Ent. Mag., 5: 176. 
1839. Pteronarcys biloba Newman, Mag. Nat. Hist., 3: 34. 
1841. Pteronarcys biloba Pictet, Perlides, p. 135. 
1861. Pteronarcys biloba Hagen, Syn. Neur. N. Am., p. 15. 
1873. Pteronarcys biloba Hagen, Proc. Post. Soc. N. H., 15: 284. 
1907. Pteronarcys biloba Klapdlek, Bull. Internat. Acad. Sci. Boheme, 12, 
p. 10 of reprint. 
1876. Pteronarcys bicarinatus Provancher, Le Nat. Can., 8: 190. 
1878. Pteronarcys bicarinatus Provancher, Le Nat. Can., 10: 125. 
1883. Pteronarcys bicannatus Provancher, Pet. Faun. Can., N4urop., p. 69. 
Distribution . — Trenton Falls and Ithaca, New York; St. IMar- 
tin’s Falls, Albany River, Hudson’s Bay; Black ^Mountains, 
North Carolina; Virginia. 
9. — Length to tip of wings, 46 mm.; expanse of wings, 84 mm. 
cf. — Length to tip of wings, 34 mm.; expanse of wings, 55 mm. 
Dark fuscous above and below,. the head without paler markings except for 
rufous spots outside the lateral ocelli. Prothorax a little broader posteriorly, 
front border and sides straight, hind margin slightly arcuated, angles not 
sharp; a narrow, rufous median line. Legs dark brown, knees paler. 
TRANS. AM. ENT. SOC., XLIII. 
