The Parasitic Hymenoptera collected by the Canadian 
Arctic Expedition, 1913-18 
By Charles T. Brues 
Bussey Institution, Harvard University. 
The following report is based on the material collected or reared by 
Mr. F. Johansen. Most of the material was obtained near the headquarters 
of the Southern Party of the Expedition at Bernard harbour, Dolphin and 
Union strait. Three new species^ are described. It was felt undesirable ■ to 
give specific names to a number of the specimens. 
ICHNEUMONIDiE. 
Amblyteles russatus Cress. 
Icheunion russatus Cresson, Proc. Acad. Nat. Sci., Philadelphia, 1878, p. 353. 
One specimen from Bernard harbour, Dolphin and Union strait, Nortli- 
west Territories; collected on flowers in a sheltered place, July 18, 1915. 
Described originally from Vancouver, B.C. 
Amblyteles suturalis Say. 
Ichneumon suturalis Say, Boston Journ. Nat. Hist., vol. 1, p. 227 (1836); complete writings, 
vol. 2, p. 685. 
Two specimens from Bernard harbour, Northwest Territories, May ]S and 
July 12, 1915. 
A widely distributed North American species. 
Amblyteles spp. 
There are four other species in the collection not referable to any palsearctic 
or nearctic species so far as I can ascertain. It seems hardly worth while, 
however, to add isolated descriptions to those of an already large number of 
North American species which have not been studied in a comparative way^ 
Mesoleptus insularis Ashm. 
Exolytus insularis Ashmead, Proc. Ent. Soc. Washington, vol. 4, p. 168 (1902). 
Three specimens, Bernard harbour. Northwest Territories, August 14, 1915, 
collected on flowers on southern slope of ridge. Originally described from Popof 
island, Alaska. 
Aptesis nivarius, n. sp. 
Female.— Length, 5 mm. Dull ferruginous, varied with black as follows: 
cheeks near base of mandibles, propleurae anteriorly, margins of mesopleurse, and 
propodeum; antennse blackish at tips; abdomen piceous along the sides; legs 
iThe types of all new species described in this report are deposited in the National Collection 
of Insects, Ottawa. 
