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THA NSA C TIONS of the YORKSHIRE NA JURA LIS TS' UNION. 



PART I. FOR 1877 contains the commencement of "The Birds of Yorkshire, " 

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

 water Mollusca of Yorkshu-e," by Messrs. "Wm. Nelson and J. W. Taylor ; a 

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

 order, by Mr. "W. Denison Roebuck ; a paper on " Yorkshire Macro-lepidoptera 

 in 1877," by Mr. G. T. Porritt, F.L.S. ; one on "Yorkshire Micro-lepidoptera 

 in 1877," by Mr. Wm. Prest : paj^ers by Mr. S. L. Mosley, on "Yorkshire Diptera,' 

 and on the Yorkshire species of Hemiptera of the Family Psi/llidce ; 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- 

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

 Yorkshire Ichneuinonidcc, by ]\Ir. S. D. Bairstow, F.L.S. ; and on Yorkshire 

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



W. Denison Roebuck, Sunny Bank, ^ 

 Leeds, 



^^'SL E. Clarke, I 

 5, East View, Hyde Park Road, Leeds, ) 



H. W. MARSDEN, 



NATURAL HISTORY AGENT AND BOOKSELLER. 



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



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

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"Bijou List of British. Eutterflies," Beautifully printed incolouis 



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*' Graduated List of British Birds." specially prepared for 

 reference and labelling, 6d. 

 " Lepidopteeists' Calendar," Limp Cloth, 3,6. Interleaved, 5/- 



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