The YNU's Recorder for bees, wasps and ants is Dr Michael Archer, who holds over 33,000 records of Hymenoptera. All records are sent to the Bees, Wasps and Ants Recording Scheme (BWARS), who make the data publicly available via the NBN Gateway at 10km resolution. A PDF version of his Introduction to the Yorkshire aculeates is available to download here.
Dr. Archer recently published People, Places and Species - a History of the Study of Wasps, Ants and Bees in Watsonian Yorkshire to coincide with the YNU's 150th anniversary in 2011. Copies of this book are available for purchase at £4 (postage is free) by contacting Dr. Archer at 17 Elmfield Terrace, York, YO31 1EH or via e-mail (click link to send an e-mail).
Nest of Dolichovespula norwegica