9^ YORKSHIRE NATURALISTS' UNION. 



YOEKSHIPvE HYMENOPTEEA : 

 THIRD LIST OF SPECIES, 



BASED UPON OBSERVATIONS MADE IN 1879, 1880 AND 1881. 



BY 



S. D. BAIRSTOW, F.L.S., 



Of Port Elizabeth, Cape Colony, formerly Secretaiy of the Entomological 

 Section of the Yorkshire A^aturalists' Union; 



W. DENISON ROEBUCK, Leeds, 



Joint-Secretary of the Yorkshire Naturalists' Union; 



AND 



THOMAS WILSON, York. 



[Since the publication of my last report good work has been 

 done in the investigation of the insects of this order in Yorkshire, 

 the result being that the present paper is the means of adding to 

 the previously known fauna of the county about a hundred 

 species, the bulk of them being Tenthredinid^ and Ichneumonidse 

 The great preponderance of these additions we owe to the labours 

 of our new collaborator, who has for three seasons diligently and 

 successfully worked the country which lies within about 6 miles 

 west and south-west of the city of York. Portions of the results 

 have been published by him in the Naturalist and the Entomolo- 

 gist; these records are incorporated, in order that the papers in 

 the present Transactions may include the whole of what is known 

 upon Yorkshire Hymenoptera, in continuation of my first report. 

 — W. D. R.] 



Faviily TENTHREDINID^—Sawflies. 



[In the Entomologist for April, 1881, vol. xiv., pp. 88 — 91, 

 Mr. Thomas Wilson published a paper entitled "Tenthredinidae 

 near York," in which he placed on record the results of his 

 investigations in 1879 and 1880. To these are added in the 

 present list numerous records made by him in 1881, which have 

 not before been published. The Sawfiies which he collected 



Trans.Y.N.U., 1879 (pub. I8S2). Series D 



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