The Neuropteroid Insects of the Canadian Arctic Expedition, 
1913-18. 
By Nathan Banks. 
The Neuropteroid insects taken by the Canadian Arctic Expedition, 1913-16, 
l)elong to seven species, two of which are herewith described as new. Most of 
the specimens collected by Mr. Frits Johansen belong to one species which is 
common in the Arctic regions. 
PERLIDAE. 
Alloperla pacifica Banks. 
Two from Ketchikan, southern Alaska, September 10, 1916, 
Nemoura, sp. 
Several specimens, quite possibly of a new species, from Bernard harbour, 
Northwest Territories, June 30, 1916, and July 30,. 1916. They are in poor 
condition and cannot now be described. 
Capnia nearctica, n. sp. 
Black. Body long and slender. Pronotum plainly broader than long, a 
little broader behind than in front, with a deep transverse groove in front 
parallel to the front margin. Wings in the male not reaching one-fourth way 
to the tip, in the female reaching to the tip of body. Setae about one-half the 
length of the body. In the male the third segment from the tip has a rather 
large, rounded, median elevation, the surface of which is deeply pitted and 
provided with short hairs, and behind over the last two segments is a median 
groove bordered by nearly parallel elevated ridges; in the posterior part the 
ridges swell out a little; the groove is fully two and a half times as long as 
broad. 
Length, 6 mm. 
Many specimens from Bernard harbour, Northwest Territories, Canadian 
Arctic Expedition, June 25, 1915 (F. Johansen, coll.). Type in Canadian 
National Collection of Insects, Ottawa, paratype in Museum of Comparative 
Zoology, Cambridge, Mass. Differs from other species in the shape and 
sculpture of the tubercle near tip of body. 
TRICHOPTERA. 
Rhyacophila alberta Banks. 
One from Ketchikan, southern Alaska, September 10, 1916. 
Chilostigma praeterita Walker. 
Many specimens. All taken at Bernard harbour, Northwest Territories, 
September 23, 1915. There is much variation in the extent of the markings 
on the front wings almost uniformly dark-coloured. Described from Canada. 
I have seen it from several northern localities and it also occurs in the more 
northern parts of Europe. 
