Hemiptera of the Canadian Arctic Expedition 



By EDWARD P. VAN DUZEE. 



The small collection of Hemiptera taken by the Canadian Arctic Expedition 

 contains representatives of eleven species of which one is certainly new to 

 science and is here described as Euscelis hyperboreus, and another is a Siberian 

 saldid now first reported from North America. The softer Homoptera and 

 Miridae are in many cases too much changed by their immersion in alcohol to 

 admit of positive identification. All the specimens recorded here were taken 

 by Mr. F. Johansen during the progress of the Expedition. 



Ligyrocoris constrictus Say. 



One specimen taken at Ketchikan, Alaska, September 10, 1916. This 

 species has been found throughout Canada and the northern United States from 

 the Atlantic to the Pacific Oceans. 



Stenodema vicinum Provancher. 



A single individual taken with the preceding. It is distributed throughout 

 the same territory but extends somewhat farther south in the United States. 



Orthotylus sp. 



Bernard harbour, Dolphin and Union Strait, Northwest Territories, July 10, 

 1916. Nine examples. This form is very near Orthotylus discolor J. Sahlberg, 

 described from northern Siberia, and may prove to be identical with that species 

 but the present material is in too poor a condition for positive determination. 

 They are of the same size, 3% mm., and are thickly clothed with stiff black 

 hairs. The base of the vertex is strongly carinate and paler, the posterior field 

 of the pronotum and median line of the scutellum are also pale, the second 

 segment of the antennae is about as long as the hind margin of the pronotum 

 and distinctly paler in the male, the basal segment being shorter than the 1 head. 

 All these characters and those of the legs are as described by Dr. Reuter for 

 discolor, but here the inner margin of the corium as well as the clavus is darker, 

 and the elytra of the females are not shorter and distinctly paler than in the 

 males, at least not so far as I can judge from the condition of these specimens. 

 This form seems to belong to the group of willow-inhabiting species represented 

 by Orthotylus pullatus Van D. of the western United States. 



Lobopidea sp. 



Bernard harbour, Northwest Territories, August 10, 1915. One discoloured 

 and fragmentary specimen certainly represents a small brachypterous species of 

 this genus which was probably green in life. 



Limnoporus rufoscutellatus Latreille. 



Ketchikan, southeastern Alaska, September 10, 1916. Four examples 

 taken running on the surface of a pond. Widely distributed in the northern 

 portions of Europe and America. 



