Contents

161 Editorial

163 Simon Warwick, President of the Union 2015-16

165 R. Goulder Aquatic plants in the Calder & Hebble Navigation: distribution and conservation value

177 Colin A. Howes MBE and Albert Henderson The labours of a pair of Coot in a floating world: the maintenance of a nest site on a rising water table

181 W.A.Ely Yorkshire Ichneumons: Part 4

187 Simon Pickles and Matt Millington Inclusion of biological records and related information in local decision making

189 R.A.Baker and S.Gill A peep at the past - microscopes, men and societies in two Yorkshire towns from 1850 to 1910*

201 Roy Crossley Hydromyza livens (Diptera: Scathophagidae) in Yorkshire

202 M. Jill Lucas The Stanley misericords: a representation of evolution

208 T.L. Blockeel YNU Bryological section: report for 2014

214 Michael Archer Recorder's report for the Aculeate Hymenoptera for 2013, 2014 and 2015

216 Obituary David Jack Lindley 12 January 1958 – 7 July 2015

218 Obituary Mick Carroll 26 August 1947 - 21 October 2015

221 A.Henderson and A.Norris Yorkshire Naturalists' Union Excursions in 2015

238 P.Lightfoot Honorary Membership of the National Biodiversity Network Trust awarded to Yorkshire Naturalists' Union member Bill Ely

239 YNU Calendar 2016