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 1 are described. It was felt undesirable to 

 give specific names to. a number of the specimens. 



ICHNEUMONID^. 



Amblyteles russatus Cress. 

 Icheumon russatus Cresson, Proc. Acad. Nat. Sci., Philadelphia, 1878, p. 353. 



One specimen from Bernard harbour, Dolphin and Union strait, North- 

 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 18 ami 

 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 mesopleuro?, and 

 propodeum; antennae blackish at tips; abdomen piceous along the sides; legs 



x The types of all new species described in this report are deposited in the National Collection 

 of Insects, Ottawa. 



