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RANSACTIONSoftheYORKSHI RE NATURALISTS' UNION. 



PART I. FOR 1S77' contains the commencement of "The Birds of Yorkshire, " 



Mr. W. E. Clarke, M.B.O U. ; of an " Annotated List of the Land and Fresh- 

 ater MoUusca of Yorkshh-e," by Messrs. AVm. Nelson and J. W. Taylor; a 

 omplete list of Yorkshire Hymenoptera, with references to literature of that 

 jrder, by Mr. W. Derison Roebuck ; a paper on " Yorkshire Macro-lepidoptera 

 in 1877," by ]Mr. G. T. Pori'itt, F.L.S. ; one on "Yorkshire Micro-lepidoptera 

 in 1877," by Mr, ^Ym. Prest ; papers by Mr. S. L. Mosley, on "Yorkshire Diptera,' 

 and on the Yorkshire species of Hemiptera of the Family PsylUdce ; and a 

 eport on Yorkshire Botany in 1877, by Dr. H. F. Parsons, F. G.S. 



PARTS II. AND III. FOR 1878 contain the continuations of Mr. Clarke's 

 Birds of Yorkshire, and of Messrs. Nelson and Taylor's Land and Fresh-water 

 Mollusca of Yorkshire ; an elaborate report on Yorkshire Botany in 1878, by 

 Dr. Parsons ; the commencement of Dr. Parsons' ' ' Moss-Flora of the East- 

 Eiding" ; papers on Yorkshire Lepidoptera in 1878, by Mr. Porritt, F.L.S. : on 

 Yorkshire Ichneianoiiidce, by 3[r. S. D. Bairstow, F.L.S. ; and on Yorkshire 

 Hymenoptera, observed in 1878, by Mr. W. Denison Eoebuck. 



^Y. Denison Eoebuck, Siinny Bank, . 

 Lseds. 



Wm. E. Clabke, l^'"'' 

 5, East Yiew, Hyde ParkEoad, Leeds. ' 



H. W. MARSDEN, 



NATURAL HISTORY AGENT AND BOOKSELLER. 



Cabinets and apparatus of all kinds, of the best make on the lowest terms, 

 British and European Macro-Lepidoptera, Preserved Larvje of rare British 

 Lepidoptera. 



BOOKS. — New and Second-hand, on Natxiral History Subjects. 

 The largest and best stock of Bird-Skins and Birds' Eggs in England. Catalogue^ 

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*'Biiou List of British Butterflies," Beautifully printed in colouis 



6d. 



"Graduated List of British Birds." speciaUy prepared for 

 reference and labelling, 6d. 

 " Lepidopteeists' Calendak," Limp Cloth, 3/6. Interleaved, 5 > 



37 MIDLAND ROAD, GLOUCESTER. 



