Blomsterfluer (Norwegian Wikipedia)

Nielsen, Tore R. Syrphidae checklist. www.syrphidae.com/checklist.php Arkivert 28. september 2007 hos Wayback Machine.
www.syrphidae.com Arkivert 13. november 2007 hos Wayback Machine. Vockeroth, J.R. (1980): A review of the Nearctic species of Melangyna (Meligramma) frey (Diptera: Syrphidae) - Can.Ent. 112, 775-778.

web.archive.org

Nielsen, Tore R. Syrphidae checklist. www.syrphidae.com/checklist.php Arkivert 28. september 2007 hos Wayback Machine.
www.syrphidae.com Arkivert 13. november 2007 hos Wayback Machine. Vockeroth, J.R. (1980): A review of the Nearctic species of Melangyna (Meligramma) frey (Diptera: Syrphidae) - Can.Ent. 112, 775-778.