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BioImages: The Virtual Field-Guide (UK)
Perkins, R.C.L., 1919
The British Species of Andrena and Nomada
A lengthy account of the Britsh species of Andrena and Nomada.
Includes a key to families, and keys to genera of the families Anthophoridae and Andrenidae.
There are separate keys to male (p282) and female (p293) Andrena, and to male (p305) and female (p310) Nomada.
Malcolm Storey
Taxonomic Scope
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