The descriptive text, below the map, is from the Cornish Red Data Book (2009). The map on this web page depicts the organisms distribution and shows the records made pre-2000 and those made since.
Range & Status
A parasitoid on wood-nesting species of Osmia spp. of bee. Found in a variety of open, sunny habitats, usually seen around old wooden posts, stumps and dead trees where its host nests. It occurs from Cornwall to Kent and north to Yorkshire, a widespread species which is rarely found. Only one recent, post-1980, record from the extreme south-east of Cornwall, also several older records.
I.J. Bennallick, S. Board, C.N. French, P.A. Gainey, C. Neil, R. Parslow, A. Spalding and P.E. Tompsett. eds. 2009. Red Data Book for Cornwall and the Isles of Scilly. 2nd Edition.Croceago Press.
The Cornish Red Data Book Project was led by the Cornwall and Isles of Scilly Federation for Biological Recorders (CISFBR). The full text and species accounts (minus the maps) are available on the CISFBR website.