I have seen no type specimens, but the description is consistent with this interpretation. B. fulvescens is therefore likely to be the oldest available name for this species. Palaearctic, Oriental Regions. See comments on B. honshuensis . There is considerable variation in the male gonostylus, but this variation appears to overlap between the the colour forms and I shall treat them as parts of a single variable species.
Further evidence is awaited.
See the comments on the subgenus Psithyrus and on B. hyperboreus . This convention has since changed and recent authors have consistently used s . Muscorum, of which the examples I possess may be immature specimens . This convention has since changed and recent authors have consistently used s .