Key for the identification of British Histeridae

The current check list of British Histeridae (Duff, 2012) lists 52 species from 21 genera and 7 subfamilies. All these species can be identified using the key below although some might require dissection to confirm.
Author(s): 
Mike Hackston
Free: 
Yes
Available as: 
Online
Keywords: 
Histeridae clown beetles Hister beetles Arthropoda