1873.] | 28 T [Hagen. 
more or less darkly clouded, principally in the forewings around the 
pterostigma and the basal border ; abdomen brown, beneath, in the 
middle more or less yellowish or orange. 
Male. The ninth ventral segment inflated, pale brown, shining, 
covering the tenth, notched at the tip deeply ; upper appendages 
horizontal, short, triangular, somewhat depressed before the rounded 
tip ; penis as in Pt. nobilis. 
Female. The eighth ventral segment cut straight at tip, some- 
times with a fine median longitudinal furrow or impressed line ; two 
small triangular processes, widely distant from each other at the tip 
of the segment, which are yellowish or dark, and membranous ; last 
dorsal segment with a round darker spot near the base. 
Length, with the wings, 40-60 mm.; exp. of the wings 75 to 
106 mm. I have before me seventeen specimens from the Saskat- 
shawan River; both sexes from the Red River of the North by R. 
Kennicott ; from Ware, Hampshire county, Mass., both sexes, among 
them the largest female seen (length 60 mm., expanse 106 mm.); 
from Maine a male; from Michipicoten Isl., Lake Superior, a female 
collected by Mr. Barnston, together with a nympha; a nympha skin 
from Massachusetts ; a male, the type, from Martin’s Falls, Hudson’s 
Bay; and the male, spoken of under Pt. Proteus, from New York, 
both from the British Museum; I also examined a number of other 
specimens in the British Museum. Of the eight specimens men- 
tioned by Walker, five are females, the others males, one given to 
me. 
The nympha is forty mm. long ; grayish brown; spots outside of 
the posterior ocelli, and the basal border of the antennz as in the 
imago ; the angles of the prothorax more produced ; sete yellowish ; 
last dorsal segment prolonged into a sharp point; the eighth ventral 
seoment with a small incision in the middle of the apical border, an 
indication of the female organs. A smaller nympha from the Sand- 
hill River, Minnesota, length 25 mm., has the tip of the last segment 
slightly bent upward. 
There is no doubt that this species is really P. re galis, Newm., 
as I was able to compare my specimens with the types in the British 
Museum, besides they agree well with the description. Farther I have 
no doubt that Kollaria insignis Pictet, Hag. Syn., 16, 6, is the same 
species. I have not seen his type (in the Vienna Museum), but the fig- 
ure and the description agree in every respect. The maxille and their 
palpi are somewhat longer in this species than in the others, but are, 
