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.

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.

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).

An identification key is in Else (1999).

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.

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