63 YORKSHIRE NATURALISTS* UNION. 



REPOETS 



OF THE 



ENTOMOLOGICAL SECTION; 



18 7 8. 



YORKSHIRE HYMENOPTERA IN 1878 



AND 



SECOND LIST OF SPECIES. 



By WILLIAM DENISON ROEBUCK, Leeds, 

 Secretary to the Yorkshire Naturalists' Union, 



It will be gratifying to the Entomological Section to find the 

 task of reporting on the Hymenoptera so soon divided, instead of 

 being confided to one reporter only; Mr. S. D. Bairstow having 

 undertaken to deal with the Ichneumonidse in a separate report; 

 and it will be still more gratifying to the two reporters to 

 welcome new laborers into the field and to see the further 

 specialization of the study and subdivision of the task. It seems 

 evident that to give an impulse to the study of such orders as 

 this, the periodical publication of results already obtained (how- 

 ever incomplete and meagre these may seem) is useful if not 

 absolutely necessary. Already has the publication of the first 

 paper brought to light the existence of one member of our Union 

 who has studied the order in times past, and stimulated various 

 others to commence the study for times to come. 



The present report is partly a supplement to the preceding 

 one, partly a record of the work of 1878. I regret that none of 

 my own work appears, having been done mostly outside Yorkshire, 

 while a combination of various causes has prevented me to a large 

 extent from doing anything at all. We are consequently entirely 

 indebted to Mr. Bairstow for the records of the work of 1878. 



Trans.Y.N.U., 1S78. Series D 



