An identification key is available (Else, 1999). Females from the British mainland have the scopal hairs on sterna 5-6 black. Those from the Isle of Man and from Ireland have them extensively golden red, although the black form has been seen in Ireland too (D B Baker, pers. comm.).

An identification key is available (Else, 1999). Females from the British mainland and the Isle of Man have black scopal hairs on the fifth and sixth sterna, those occurring in Ireland have the sternum with the entire scopa reddish-golden.

One of a suite of eight superficially similar species. All are medium-sized to large solitary bees nesting in holes, largely in various forms of timber either in standing deadwood or fence posts.

Extinct in Britain. A single record from 1847. Else (1999) includes this species in the notes but not the key, although it should be included in his forthcoming monograph. A key is provided in Amiet et al. (2004).

A key is available in Perkins (1925). Else & Edwards (in press) will also have a key. Formerly included in Chalicodoma, now treated as a subgenus of Megachile.

An identification key is in Else (1999).

This is a minute species, superficially resembling Lasioglossum minutissimum (Kirby). It may have been overlooked at times because of its small size.

A small black Lasioglossum, added to the British list by Hawkins (2011). The female is unusual in having patches of flattened plumose hairs overlying the marginal areas posteriorly on the middle tergites, rather than anteriorly as is the norm for Lasioglossum. In the male the gena is produced backwards in the form of a variably developed triangular tooth. Lasioglossum sabulosum (Warncke), sometimes synonymised with sexstrigatum, is now considered a good species.

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A very similar species to the more common Lasioglossum lativentre (Schenck) and some records are probably due to misidentification of that species. Perkins (1922) unfortunately transposed the male genitalia characters, the most reliable way of distinguishing the two species, in his seminal paper on Lasioglossum.