Andrena bicolor (Gwynne's Mining-bee)
A smallish Andrena with the face black-haired and usually also the femorae and sides of the abdomen (more so in the spring generation). Females have a reddish-brown pile on the top of the thorax and a sparse pile of brownish hairs on the tergites that form weak bands. Females of A. angustior with black-haired faces can look very similar but have a longitudinal groove on the clypeus and much broader apical depressions on tergites 2-4.

Males of A. congruens could be mistaken for those of bicolor but have antennal segment 3 shorter than 4 (longer in bicolor) and never have black hairs on the legs or sides of the thorax.

This is a bivoltine species with a spring genrtation that flies from March to June (later in the north) and a summer generation that flies from June until August. Many sorts of flowers and blossoming shrubs or trees are visited.

This is one of our commonest mining bees and can be found throughout the British Isles in a variety of habitats.

BWARS account:
www.bwars.com/index.php?q=bee/andrenidae/andrena-bicolor
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