[Syrphidae] Paper request

[Stefan Pruner]

Dear Syrphidologists!

In the StN Species Accounts the following paper is cited for  
information on Melanostoma dubium. I guess it could help me for  
writing a few lines in my master's thesis about that species.

Haarto, A. & Kerppola, S. (2007a) Finnish hoverflies and some species  
in adjacent countries. Otavan Kirjapaino Oy, Keuruu. 647pp.

Maybe someone can help me with that.

With best regards!
Stefan Pruner