116 Mi\ J. E. Collin on Dipterafrom 



IX. — Dipt era {Orthorrhapha Brachycera and Cyclor- 

 rkapha) from Spitsbergen and Bear Island. Results of the 

 Oxford University Expedition to Spitshergen, 1921. — No. 22. 

 By J. E. Collin, F.E.S. 



The small collection of Diptera placed \\\ my hands by 

 Prof. E. B. Poultoii for purposes of identification contained 

 only eight species. Of the seven collected in Spitsbergen, 

 six have previously been recorded from that island, while all 

 seven appear to have a wide range of distribution in the 

 north. Tiie eighth species, collected in Bear Island, appears 

 to be an undescribed species ; its association witli gulls* 

 nests, and the fact of its having been found also in the island 

 of Sr. Kilda, makes it probable that it will also be found to 

 have a wide distribution in northern regions. 



Empididse. 

 Ehamphomyia caudata^ Zett. 



1 (5", south side of Ice Fiord, Advent Bay, 0-100 feet. 

 On flowers of Dryas octopetala and Cerastium alpinum, C. S. 

 Elton, July 18th, 1921. 



This brightly shining black species with pilose legs and 

 remarkable male hypopygium was recorded from Spitsbergen 

 by Holmgren in 1869. It has been confused by some writers 

 with R. cethiops, Zett., a species whose range of distribution 

 extends much farther south ; consequently it is not possible 

 to record accurately the distribution of caudata beyond tlie 

 fact of its occurrence in Northern Scandinavia and Spits- 

 bergen. If, as I believe, longestylata is a synonym of this 

 species, it also occurs in the Kanin Peninsula, North Russia. 



Syrphidae. 



Syrphus tarsatus, Zett. [dryadis^ Holmgr.). 



1 ? , south side of Ice Fiord, Advent Bay, 0-100 feet. 

 On flowers of Dryas octopetala and Cerastium alpinum, C. S. 

 Elton, July 18th, 1921. 



This female is certainly the same as Holmgren's dryadis, 

 the type of which was also found frequenting the flowers of 

 Dryas in Advent Bay. The face is obscurely yellowish, 

 witli the jowls and mouth-edge black, the dark colour spreading 

 upwards at the sides to include tlie facial foveas and with 

 three brownish-black stripes extending upwards from the front 



