Lasioglossum aeratum KIRBY 1802; Lasioglossum semiaeneum BRULLE 1832; Lasioglossum viridaeneum BLUTHGEN 1918
Although immediately recognisable as one of the small metallic green Lasioglossum bees, separation from the similarly-sized, and often more numerous, Lasioglossum morio requires a more detailed examination. The round face of the female and the white hind tarsi of the male should be sufficient to confirm L. leucopus.
Distributed throughout almost the entire British Isles, with records from the Outer Hebrides (Barra) in the north, to the Channel Islands in the south, and to Ireland in the west (where there are no recent records). The worldwide distribution is the northern Palearctic, with a montane bias in more southerly areas.