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According to Verves and Fauna Europaea we should consider two species next to B. devia:

B. papei / metopiella: descriptions of Verves are confusing: 1982 in Lindner he refers to shape of tp vein and in 1990 he refers to vein r-m. Both are very variabel in shape. Following this approach we could describe several new species.

B. borealis: "Wangen mit 2-3 Reien kurzen Borsten. Helle Bereifung nur im forderen Drittel der Abdominaltergite."(Verves, 1982 in Lindner).

I have not yet ever seen a typical borealis nor a typical papei.

Liekele