26 ROEBUCK : ON YORKSHIRE SAWFLIES. 



Prof. Westwood, is to be found in the Ent. Ann. for 1858, 

 pp. 122-136, which will be of service to beginners by acquainting 

 them with the leading types of sawfly larvae, and the chief points 

 of differentiation from Lepidopterous caterpillars. 



Some of these larvse are well known and very destructive to 

 crops, as the "Gooseberry Grub" (Nematus ribesii), the Turnip 

 Sawfly or "Black-jack" {Athalia sj>inaru?n, &c.), the "slug" larvse 

 infesting various fruit trees l^Blennocainpa or Eriocampa spp.), the 

 corn-straw maggot {Cephus pygf/iceus) and others. The red, 

 kidney-bean-shaped galls on willow-leaves, which are produced by 

 Nematus gallicola, are very abundant and well-known. 



Directions for collection and preservation will be found in a 

 paper by Mr. Cameron^ published in the Trans. N. H.S.Glasgow, 

 1876, iii. 141. 



The number of British species is very imperfectly known and 

 the estimates made by various authors are very conflicting, and 

 mostly unreliable. I am not aware of any recent enumeration, 

 except a list of Scottish species by Mr. Peter Cameron (May, 

 1878, published by the Nat. Hist. Soc. Glasgow, price 1/6) in 

 which he gives the names and localities of 212 Scottish species, 

 distributed into 37 genera. Mr. Cameron in comparison mentions 

 that there are 268 French and 360 Swedish species. Mr. Cameron 

 has informed me that about 330 species are enumerated in a ' 

 catalogue of British sawflies which he has now in the press. 



For a number of the names in the following fragmentary 

 list I am indebted to the kindness of Mr. Peter Cameron, and of 

 Mr. Frederick Smith, F.Z.S. The species are arranged in the 

 same order as that adopted in Cameron's Scottish List, but the 

 nomenclature is given as in the original records. 



Among the records that have come under my notice which, 

 requiring verification or correction of nomenclature, cannot be 

 inserted in the list are : — 



Tenthredo neglecta, St.Farg.Mon. ']'].,22()-=submterrupfa, Steph. 



" Middle of June, Yorkshire and Scotland, J.C." Curtis, 

 B.E. plate 692. 



Trans.Y.N.U., 1877. Series D ' 



