HYMENOPTERA OF THE EAST RIDING OF 

 YORKSHIRE. 



By W. Denison Roebuck, F.L. S., 

 Ex-president of the Yorkshire Naturalists'' Union. 



Read July 25, 1906. 



WHEN engaged on the task of compiling a list of the 

 Hymenoptera for the forthcoming Victoria County 

 History of Yorkshire, I was struck by the extreme 

 paucity of records for two divisions of the county, viz., 

 York N.W. and York S.E. I was not much surprised in 

 respect of the former division, with its sparse population and 

 want of scientific activity, but it was indeed surprising to 

 find so little known for the East Riding, with its host of 

 active and enterprising investigators. It therefore seemed 

 to me that a complete summary of all that is actually on 

 record for the Riding would be a useful and, I hope, accept- 

 able paper for the Transactions of the Hull Scientific Club — 

 my hope being that it might stimulate the Entomologists to 

 collect insects of that order — and those who are Lepidopterists 

 to carefully preserve the ichneumon flies they rear, and have 

 them properly identified. It would be a service not only to 

 the East Riding naturalists themselves, but to Mr. Claude 

 Mode)', who is very ably studying and monographing the 

 British Ichneumonidge, if he should be liberally supplied with 

 specimens, care being always taken to give the full and 

 complete data as to locality, species on which parasitic, 

 date, etc., so as to ensure the best scientific results being 

 achieved. In like manner specimens of other groups might 

 be submitted to the specialists. The best thing would be, 

 however, for some of the young and active entomologists to 

 take up the study of Hymenoptera themselves. 



I first give a complete bibliography of all the papers I 

 have seen, and then a systematic list of the species on 

 record. 



BIBLIOGRAPHY. 



1788. Mr. Marshall. 

 Provincialisms of East Yorkshire [in Holderness " Bummle 

 Bee " = Bombus]. 



Marshall's " Rural Economy of Yorkshire," 1788, Vol. II., 



X 



