58 c Canadian Arctic Expedition, 1913-18 



Frons bristled as in robusta; cheek with four well-differentiated bristles, 

 two of which are much stronger than the others, the normal hairs strong; third 

 antcimal joint very little shorter than second; arista short, thickened to distinct- 

 ly beyond middle; profile as in PL VIII, fig. 21. Dorso-centrals irregular in type, 

 three strong ones on one side and three strong and one weak one on the other; 

 three stenmplurals. Abdominal segments two to four with discal macrochaetse. 

 Wings as in ntlmxta. Fore tarsi dilated. 



Length. '.)-7">mm. 



Typo Locality: Cockburn point, Northwest Territories, Canadian Arctic 

 coast, Sept ember o, 1914 (F. Johansen). 



The only species I find record of from the arctics is aenea Staeger, described 

 from Greenland. This species has the abdomen entirely black and is apparently 

 distinct from nrdica. 



CALLIPHORID^:. 



This family contains a number of genera the larvae of which feed normally in 

 carrion. The flies are popularly known as flesh-flies, bluebottles, and blow-flies. 



Originally the genera now included here formed part of the family Musci<he 

 but within recent years the latter has been divided, several families now contain- 

 in'; genera that at one time formed part of the Muscidse. It is at present, accord- 

 ing i o some entomologists, a debatable point whether our concept of the Muscidse 

 should not be revised to the extent of applying the name to what is now called 

 Anthomyiidse and dropping the last name entirely. With this view I do not 

 agree, but the present paper is not the proper place to discuss the question, more 

 especially as there are no true Muscidse in the collection. 



Cynomyia Robineau-Desvoidy. 

 There is but one species of this genus in the collection. 



Cynomyia cadaverina Robineau-Desvoidy. 

 Cynomyia cadaverina Robineau-Desvoidy. Essai sur les Myodaires, p. 365, 1830. 



Twenty-four specimens with data as follows: thirteen specimens, Bernard 

 harbour, Dolphin and Union strait, Northwest Territories, May, June and -July, 

 11)1") and 1916 (F. Johansen) ; six specimens, Barter island, Arctic coast of Alaska 

 June, 20 and 23, and July 2, 1914, and June 15, 1914 (D. .lenness) three speci- 

 mens, west of Kongenevik, Camden bay, Alaska, June 4, 1914 and two speci- 

 mens. Nome, Alaska, August 24, 25, 1916 (F. Johansen). 



Calliphora Robineau-Desvoidy. 

 There is one species in the collection, represented by three specimens. 



Calliphora viridescens kobineau-Desvoidy. 

 Cattipkora viridescens Robineau-Deavoidy. Kssai sur les Myodaires, p. 537, 1830. 



This species occurs in Europe and North America. Like Hie. preceding 

 species it is generally distributed throughout North America, and has been pre- 

 viously recorded from Alaska. 



Data on specimens: Nome, Alaska, June 21, 1916 (F. Johansen). 



Phormia Robineau-Desvoidy. 



There are two -pecies in the collection, one of which, terrce-novce, occurs 

 generally throughout North America, and has been reported from Greenland and 



Alaska. 



