igo Y.N.U. : Officers and Committees of Research, 1921. 



Yorkshire Coleoptera Committee. — Chairman : IM. I>. Thompson, 

 Middlesbrough. Convener: \V. J. Fordham, Sheffield. Other Members : 

 jolm Crarduer, West Hartlepool ; E. \V. JNIorse, New Barnet ; T. Stain- 

 forth, B..\., B.Sc, Hull ; E. G. Bavford, Barnslev ; E. Bilton, Hull ; 

 J. Digby Firth, Leeds ; G. B. Walsh, B.Sc., Scarborough ; .A.. E. Winter, 

 Harrogate ; A. E. Thornes, Leeds : J. ]\L Brown, B.Sc, Sheffield. 



Hymenoptera, Diptera and Hemiptera Committee. — Chairman : 

 E. C. HorrcU, Leeds. Convener and Rep. on Executive : Rosse Butter- 

 field, Keighley. Referees : Rev. F. D. Morice, M.A., Brunswick, Mount 

 Hermon, Woking, and Claude Morley, Monks Soham (for Hymenoptera) ; 

 Percy H. Grimshaw, Royal Scottish Museum, Edinburgh (for Diptera) ; 

 E. A. Butler, M.A., London, and J. Edwards, Coleburn, Cheltenham 

 (for Hemiptera) ; G. T. Porritt, Huddersfield, and J. F. St. X. King, 

 Kelvinside, Glasgow (for Neuroptera, Orthoptera and Trichoptera). 

 Other Members : E. G. Bayford, Barnsley ; M. L. Thompson, Middles- 

 brough ;■ T. Stainforth, B.A., B.Sc, Hull ; W. J. Fordham, Sheffield ; 

 J. F. Musham, Selby ; G. T. Porritt, Huddersfield ; W. P. Winter, B.Sc, 

 Shipley; J. H. Ashworth, St. Annes-on-Sea ; J. M. Brown, Sheffield; 

 A. E. Bradley, Leeds. 



Lepidoptera Committee. — Chairman : T. Ashton Lofthouse, Lin- 

 thorpe, ^Middlesbrough. Convener and Secretary : B. ISIorley, Skelman- 

 thorpe. Rep. on E.xeculive : Prof. E. O. Croft, M.D., Leeds. Other 

 Members : G. T. Porritt, Huddersfield ; Capt. H. D. Smart, Shelley ; 

 J. Beanland, Bradford ; Rosse Butterfield, Keighley ; Prof. W. Garstang, 

 M.A., D.Sc, Leeds. 



Yorkshire Arachnida Committee. — Chairman : W. Falconer, 

 Slaithwaite. Convener and Rep. on Executive : T. Stainforth, B.A., 

 B.Sc, Hull. Other Members: W. P. Winter, B.Sc, Shipley; W. J. 

 Fordham, Sheffield ; Rosse Butterfield, Keighley ; G. B. Walsh, B.Sc, 

 Scarborough. 



BOTANY. 

 Section E. — Botany. 



President : Prof. J. H. Priestley, B.Sc, Leeds. Secretaries : C. A. 

 Cheetham, Old Farnley, Leeds ; J. Eraser Robinson, zz Harley Street, 

 Hull. Rep. on Executive: J. Beanland, Bradford. 



Yorkshire Botanical Survey Committee. — Chairman : W. H. 

 Pearsall, M.Sc, Leeds. Convener and Rep. on Executive : W. H. Burrell, 

 Leeds. Other Members : C. Waterfall, Chester ; J. Hartshorn, Lcyburn ; 

 J. W. H. Johnson, M.Sc, Walton ; W. E. L. Wattam, Huddersfield ; 

 H. J. Wilkinson, York; Wm. G. Smith, B.Sc, Ph.D., Edinburgh; 

 W-. Robinson, D.Sc, Manchester ; A. L. Armstrong, Sheffield ; F. W. 

 Whittaker, Batley ; Miss M. A. Johnstone, B.Sc, Cheadle Hulme ; 

 W. B. Crump, Brighouse ; W. P. Winter, B.Sc, Shipley ; W. B. Haley, 

 Cleckheaton ; T. Cockerline, Leeds ; E. Snelgrove, B.A., Sheffield ; 

 T. W. Woodhead, Ph.D., M.Sc, Huddersfield ; Miss D. Hilary, B.Sc, 

 Bingley. 



Plant Galls Committee. — Chairman : W. Falconer, Slaithwaite. 

 Convener : W. P. Winter, B.Sc, Shipley. Rep. on Executive : W. 

 F"alconer, Slaithwaite. Other Members : H. Wager, D.Sc, F.R.S., 

 Leeds ; W. J. Fordham, Sheffield ; J. Beanland, Bradford ; F. A. Mason, 

 Leeds ; Jas. M. Brown, B.Sc, Sheffield ; R. Butterfield, Keighley ; 

 C. A. Cheetham, Leeds ; A. A. Dallman, Tranmere, Cheshire ; MissE. M. 

 Pilkington, Leeds. 



Yorkshire Bryological Committee. — Chairman and Convener : 

 W. Ingham, B.A., York. Rep. on Executive : F. Haxby, Bradford. 

 Other Members: J. W. H. Johnson, M.Sc, Walton ; A. R. Sanderson, 

 Pctaling ; E. Snelgrove, B.A., Sheffield ; W. H. Burrell, Leeds ; W. 

 Bellerby, York ; C. A. Cheetham, Leeds ; F. E. Milsom, B.Sc, High 

 Burton, Huddersfield; J. R. Simpson, Selkirk. 



