|Male Coelioxys rufescens|
C. rufescens is fairly widespread in south and SE England (scattered further north), though Coelioxys species may be under-recorded; I have recorded it in our garden in previous years, as well as one of its possible hosts, the leaf-cutter bee Megachile centuncularis - there are several others noted in Collins & Roy (2012) though the full host range is uncertain. It flies fairly early (from June) for a British Coelioxys (along with C. elongata); most are not active until July.
|Megachile centuncularis approaching a common bird's-foot trefoil (Lotus corniculatus)|
|Megachile centuncularis feeding on a garden thistle (Cirsium sp.)|
Collins, G.A. & Roy, H.E. (eds.) (2012). Provisional Atlas of the Aculeate Hymenoptera of Britain and Ireland. Part 8. BRC, Wallingford.
Strohm, E., Kroiss, J., Herzner, G., Laurien-Kehnen, C., Boland, W., Schreier, P. & Schmitt, T. (2008). A cuckoo in wolves' clothing? Chemical mimicry in a specialized cuckoo wasp of the European beewolf (Hymenoptera, Chrysididae and Crabronidae). Frontiers in Zoology 5(2). [online] [accessed 06/06/2013].