Cornish Biodiversity Network  -  Supporting Wildlife Recording

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Cornish Red Data (2009)

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.

Nysson dimidiatus

Range & Status

A small red and black wasp which is a cleptoparasite of the similar looking wasp Harpactus timidus which occurs in the same sparsely-vegetated sandy areas as its host. It is very scarce in most districts and considerarbly less frequent than its host. Whereas there are numerous older records for Cornwall, there is only a single post-1980 record from Church Cove, Gunwalloe (Lizard Peninsula) in 1991.


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.