LUCY WRIGHT SMITH 
449 
those of Pt. dorsata, the inner edges not emarginate as in Pt. dorsata, and the 
tips only slightly curved upward. The sub-anal plates with long finger-like 
prolongations parallel with the tips of the ninth ventral segment, and not 
extending beyond them as in Pt. dorsata. The supra-anal plate produced and 
modified as a sperm-conveyer; above it appears as a narrow trough, betw'een 
the tips of the prolongations of the sub-anal plates it turns ventralward and 
ends in a structure similar to an inverted cup (fig. 3). 
Female. The eighth ventral segment not truncate as described by Hagen, 
but slightly produced with a median rectangular notch in the tip ( 9 Pt. pic- 
tetii Hagen) (fig. 4). 
This species is represented in our collection by nine males; 
two from Atlanta, Georgia, V, 1, 1908; one from Nashville, 
Tennessee, IV, 15, 1901; three from St. Paul, Minnesota; one 
(alcoholic) from New York, VII, 3, 1897; and four females; two 
from Nashville, Tennessee, IV, 15, 1901, one from St. Paul, 
Minnesota, and one from Missouri. The type specimen of this 
species is in the Museum of Comparative Zoology, Cambridge, 
Mass. 
Two instances of occurrence in the same locality of the ct’ Pt. 
nobilis Hagen and the 9 Pt. pictetii Hagen, and the striking 
siniiliarity in the coloration of the two, have led to the decision 
that they represent a single species. The possible synonomy of 
the two has already been suggested by Klapdlek.'* 
Nymph unknown. 
Pteronarcys californica Newport 
Adult 
1851. Pteronarcys californica Newport, Trans. Linn. Soc. London, 20: 450. 
1861. Pteronarcys californica Hagen, Syn. Neur. N. A., p. 16. 
1873. Pteronarcys californica Hagen, Proc. Bost. Soc. N. H., 15: 283. 
1873. Pteronarcys californica Hagen, Geol. Surv. of Colorado, p. 573. 
1883. Pteronarcys californica Packard, Third Kept. U. S. Ent. Com., p. 322. 
1907. Pteronarcys californica Banks, Can. Ent., 39: 327. 
1907. Pteronarcys californica Klapdlek, Bull. Internal. Acad. Sci. BohSme, 
12, p. 11 of reprint. 
Nymph 
1873. Pteronarcys californica Hagen, Proc. Bost. Soc. N. H., 5: 284. 
Distribution . — Ogden River, Utah; Washington Territory 
between Rocky and Cascade Mountains; Platte Canyon, Colo- 
rado; Lake Winnipeg; Powder River, Colorado; Vancouver; 
Pecos, New Mexico; California. 
* Loc. cit. p. 7. 
TRANS. AM. ENT. SOC., XLIU. 
