Lobe-spurred Furrow Bee Lasioglossum pauxillum

In Nick Owens' "The Bees of Norfolk" this species is called Large-spurred Furrow Bee, but Steven Falk calls it Lobe-spurred Furrow Bee in his field guide.

Many of the steps in the key leading to this identification were quite difficult to work through but in the end it seems like the shape of the lobes on the inner hind tibial spurs are diagnostic. This individual was found in a pheremone lure trap for Hornet Moths.

female Lobe-spurred Furrow Bee Lasioglossum pauxillum showing forewing, angulated hind corners of the propodeum, scutum puncturing and microsculpture, tergite with centrally-defined ridge defining the apical depression and inner hind tibia spur, North Elmham (Norfolk, UK), 14th June 2020

This individual also showed the lobed inner hind tibia spur. Like the one above, the underside of the tips of the antennae were yellowy. This one was found on a Dandelion flower.

Lobe-spurred Furrow Bee Lasioglossum pauxillum, North Elmham Cathedral Meadows (Norfolk, UK), 25th March 2020