1878.] 283 [Hagen. 
by Mr. M’Lachlan’s examination, agree well with the Harris speci- 
men. 
Female. The vulvar scale is small, entire and triancular, differing 
in this respect from all the other species. The two conical append- 
ages described in my synopsis, belong to Pt. regalis. The Pt. Proteus 
of Pictet is a different species, and may be Pt. Pictetii Hag. I can 
not decide now whether Mr. Gosse’s species described in the Cana- 
dian Naturalist, p. 232, belongs here. 
Nympha, ¢, full-grown. Length 30 mm. (without sete). 
Antenne blackish, middle third yellowish, and the apex also lighter 
colored ; basal border of the antenne produced into a conical lobe, 
viewed from above nearly equilateral triangular; prothorax half 
longer than broad, the anterior angles produced laterally into hol- 
lowed lobes, anteriorly, and at tip, somewhat rounded; sides very 
slightly arcuated, a little wider behind, hind angles without conspic? 
uous lobes, slightly produced behind, as the hind border of the pro- 
thorax is slightly notched each side, and straight in the middle ; lobes 
of the thorax large; in the mesothorax, the hind border of the lobes, 
oblique ; segments 1 to 8 on each side, with a strong triangular api- 
cal hook, bent towards the tip of the abdomen, last seement pointed 
sharply, the point straight; sete stout, short (10 mm.), dark, the 
apical half yellowish, but the tip again darker, blackish. The color 
of the body and legs is brownish gray, the claws yellowish, black at 
tip ; palpishort, darker at tip; antepenultimate ventral segment with 
a short incision on the middle of the apical border. 
Communicated by Dr. A. S. Packard, labelled “ probably Siskiyou 
Co., Cal., J. Hallman.” Another ¢ nympha from Vermont, C. J. 
Allen also from Dr. A. 8S. Packard, 26 mm. long, is in color, shape 
and details, almost identical. The only differences apparently arise 
from its not being full-crown, and are not important. The anterior 
angles of the prothorax are not so produced; straighter anteriorly, 
the sides straighter ; the hooks on the segments shorter, and not so 
much bent backwards. 
If. Pteronarcys californica. Newport, Hag. Syn., 16, 5. 
Dark fuscous above, the forepart of the head rufous; abdomen 
and body beneath pale orange; antennz and legs dark fuscous; sete 
pale at the base; wings obscurely hyaline; veins blackish; maxillary 
palpus nearly as long as the head; antenne inside at the base, with a 
small plate, ending behind in a sharp tooth; prothorax a little 
broader than the head, and a little broader behind than before, an- 
