Online key to Bee-flies (Bombyliidae) of North-west Europe

This online key to Bee-flies (Bombyliidae) of North-west Europe by Mark Van Veen contains a wide range of Bombyliidae species (but beware that this includes a number of continental species that don't occur in Britain).
Author(s): 
Mark van Veen
Free: 
Yes
Available as: 
Online