393 



Geographical distribution: If the Greenland Melano- 

 stoma that are quite common in West-Greenland, really is 

 M. атЫдиа Zett., or a closely allied species, is at present 

 uncertain, vide Lundbeck (10. 1, 300). M. атЫдиа occurs some- 

 what commonly in Northern and Central Europe. 



2. Platycheirus hyperboreus Stæg. 



East-Greenland. 2 specimens, 65° 75' N. 



Geographical distribution: Rather common in West- 

 Greenland, and also occurs in North-America, Pennsylvania and 

 Virginia. 



3. Syrphus torvus Ost. Sack. 



Кар Dalton July 1900 and Rode Ö August 1891, a single 

 specimen from both localities. 



Geographical distribution: Is found in North Europe, 

 on the Central European Mountains and in North America, 

 Canada, Massachusetts, etc. 



4. S. tarsatus Zett. 



Hekla Havn. 21.5.92; 12.6.92; 18. 6. У2. Gaaseland. 



AU the specimens are dark with indistinct markings. 



Geographical distribution: Common in West-Green- 

 land, also occurs on Spitzbergen, Nova Zembla, Northern 

 Scandinavia and as an alpine form on the Central European 

 Mountains. 



5. S. arcuatus Fall. 



One specimen from Кар Dalton July 1900. 



Geographical distribution: This species has only been 

 found sparingly in West-Greenland, but occurs in North and 

 Central Europe, Nova Zembla and North-America. 



6. Helophilus groenlandicus 0. Fabr. 



Hekla Havn and Rode Ö. July and August 1801. 

 Geographical distribution: Rather common in West- 

 Greenland, especially in the North, also occurs in Northern 



