Hylaeus kriechbaumeri FÖRSTER 1871; Prosopis palustris PERKINS 1900
There are very few British aculeates which are largely confined to wetland habitats. One of these is Hylaeus pectoralis, a bee which for many years was almost entirely associated with the fens of East Anglia, especially Wicken Fen, Cambridgeshire.
Since the early 1970s this bee has been found from West Sussex to east Devon, the Isle of Wight, Surrey, Essex, Suffolk, Norfolk, Cambridgeshire and Northamptonshire. Most recent records are from the coast of southern England, though it is probably as common (but overlooked) in inland sites in East Anglia, as in former times (see Else 1995d).