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TRANSACTIONS oftheYORKSHI RE NATURALISTS' 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 Yorkshire," 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 JMt. G. T. Porritt, F.L.S. ; one on "Yorkshire Micro-lepidoptera 

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

 and on the Yorkshire species of Hemiptera of the Family Psyllidoi j and a 

 eport on Yorkshh'e Botany in 1877, by Dr. R. 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-w:iter 

 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 Ichneumonidce, by Mr. S. D. Bairstow, F.L.S. ; and on Yorkshire 

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



W. Denison Roebuck, Sunny Bank, . 



Leeds, ) r, 



Wm. E. Clarke, . I 



5, East View, Hyd© Park Road, Leeds, ) . 



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NATURAL HISTORY AC^NT AND BOOKSELLER. 



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Graduated List of British Birds," specially prepared for 

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



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