15 BOOK REVIEW Archer, Michael E., 1998. Threatened Wasps, Ants and Bees (Hymenoptera: Aculeata) in Watsonian Yorkshire. A Red Data Book. PLACE Research Centre, University College of Ripon and York St. John. ISBN 0-9524970-1-8. 68 pp. with many line drawings. Obtainable from Dr. Margaret Atherden, The University College of Ripon and York St. John, Lord Mayor's Walk, York, Y031 7EX.. Price £3 (£3.50 with p.&p.) This Red Data Book deals with 107 threatened species out of a total of 321 species of aculeate Hymenoptera that have been found in Yorkshire. A complete list of all species recorded from Yorkshire is given in Appendix 1 and sites on which threatened species of aculeate Hymenoptera have been found are given in Appendix 2 with details of Natural Area and the number of records and number of species. The categories of threatened species used in the book are described, the characteristics of threatened species discussed and seven species selected for further investigation and the development of Species Action Plans. The bulk of the book is taken up with the species accounts which provide information on the status of each species, its distribution in Yorkshire, with dates of first and last records, its distribution in terms of British distribution and major habitat and other resource requirements of the species. Yorkshire is of particular interest in a national context because it includes parts, or the whole, of 17 Natural Areas and many southern species are at the northern edge of the distribution and some northern species are at the southern edge of their range in Britain. The county may therefore be useful as a barometer for changing environmental factors affecting species. This is an excellent and remarkably comprehensive publication available at a very reasonable price which should serve as a model for other regional and county Red Data Books. The data in the book will be particularly useful for Regional and Natural Area Biodiversity Action Plans, besides being of use in the UK and Local Biodiversity Action Plans. It is a must for all people interested in bees and wasps and for all conservation bodies and their staff in England including our own county here in Essex. Peter Harvey CONTRIBUTIONS TO THE NEWSLETTER Please send contributions for the next Newsletter, due out in November, to the Editor, Mr Peter Harvey, 32 Lodge Lane, Grays, RM16 2YP by the end of September at the latest. If text has already been typed on a standalone PC computer then a disk with the file would be very helpful but typed or handwritten notes are welcome. Deadline dates for the Newsletter each year January/February Newsletter: deadline - end of December April/May Newsletter: deadline - end of March August/September Newsletter: deadline - end of July October/November Newsletter: deadline - end of September Readers are advised that publication of material in the Newsletter does not imply, unless indicated to the contrary, that the views and opinions expressed therein are shared hy the editor or hy the Council of the Essex Field Club. Essex Field Club Newsletter No. 26, August 1998