4f Canadian Arctic Expedition, 1913-18 
Chiloxanthus stellata Curtis. 
This large saldid seems to be common in Arctic America. Mr. Johansen 
took adults at Demarcation point, Alaska, May 16, 1914; west of Kongenevik, 
Camden bay, Alaska, July 4, 1914, about the margins of a tundra pond; at 
Bernard harbour, Northwest Territories, July 15, 1915, and August 4 and 25, 
1915; and the young at Collinson point, Alaska, September 13, 1913; Collinson 
point, Alaska, June 25, 1914; and Bernard harbour, Northwest Territories, 
June 20, 1916. The Philadelphia Academy of Sciences possesses a good series 
taken near the mouth of the Mackenzie river. 
Calacanthia trybomi J. Sahlberg. 
Collinson point, Alaska, six adults taken June 23, 1914, and one young, 
apparently of this species, taken at Bernard harbour. Northwest Territories, 
July 19, 1915. These adults agree in all respects with the descriptions of 
iryhomi by Sahlberg and Renter and there can hardly be a question of their 
identity. It is its first-recorded occurrence in North America. 
Arctocorixa sp. 
Two examples taken from a tundra pond at Teller, Alaska, August 6, 1913. 
Euscelis hyperboreus n. sp. 
Related to extrusus Van D. and alpi7ius Ball, but smaller and narrower than 
either; pale markings on the vertex forming an angled line at apex, a transverse 
line between the ocelli, and two quadrate spots occupying the base; fuscous 
margins of the elytral nervures composed of segregated irrorations. Length, 
4-43/^ mm. 
Vertex quite strongly produced, forming a right angle in the female, its 
median length one half the basal width, the length next the eye two-thirds that 
on the median line; in the male distinctly shorter; passage to the front well 
rounded. Front broad and short, the sides slightly incurved to the base of the 
clypeus. Clypeus broad, oblong, the sides rectilinear and scarcely approaching 
at apex. Lorse broad, almost reaching the margins of the cheeks below. Prono- 
tum one-fourth longer than the vertex in the female; nearly a half longer in the 
male. Elytra short, scarcely surpassing the abdomen in the male; attaining 
the middle of the fifth tergal segment in the female; the costa strongly arcuate 
with the apex rounded. 
Valve of the male as long as the ultimate ventral segment, triangular; 
plates broad, truncate at apex, together almost quadrangular, their margins 
with a few stiff bristles. Styles but little surpassing the plates, attaining the 
apex of the anal tube. Last ventral segment of the female short, broadly 
excavated; pygofers broad, triangularly narrowed beyond the apex of the last 
ventral segment. 
Colour yellowish testaceous becoming paler beneath and a little tinged with 
fulvous on the abdomen. Vertex fuscous before an arcuated line either side on 
the anterior margin from the tip to the ocelli; a transverse line across the surface 
between the ocelli, and the disk posteriorly pale, the latter divided into two 
quadrate spots by the fuscous median line. Face fuscous, median line and lateral 
arcs of the front, sides of the clypeus and disk of the lora? and cheeks pale. 
Pronotum dusky posteriorly, the anterior submargin marked with a concentric 
row of about ten dark points. Scutellum with the margins pale and calloused 
on the basal one-half and the basal angles more or less marked with pale. 
Elytral nervures pale, mostly margined with lines composed of fuscous irrora- 
tions. Legs pale, varied with fuscous, the anterior and intermediate femora 
