Stelis pygmaea SCHENCK 1853; Heriades paxillorum CHEVRIER 1872
A relatively recent addition to the British bee list, the first specimen having been found in West Sussex in 1984.
The very few British records of this small bee are from a handful of sites in West Sussex (particularly the Midhurst and Emsworth areas) and two in Surrey. British records and observations are summarised by Else (1998). The bee may also occur in other localities in southern England which support its host species, the bee Heriades truncorum (this species was found in all the sites listed above).
Widely distributed in western Europe, from southern Finland south to Iberia, and east to Greece; also known from north Africa (Algeria and Egypt).