ROEBUCK : ON YORKSHIRE CHRYSIDID^. 43 



Chrysis ignita, L. Smith bred numerous specimens from 

 a nest of Vespa rufa which he obtained in 1852 in Yorkshire 

 (near Wakefield). (Zool. 1852, x. 3702; B.F.H. 1858, p. 219; 

 Ent. Ann. 1861, p. 80). I have found this abundantly at 

 Knaresbro' ! Pannal ! Harewood ! East Rigton near Wetherby ! 

 Thorner S Meanwood ! and Moor AUerton, near Leeds ! 



C. Ruddii, SJmck. Yorkshire (Smith, List B.Hym. Acul. in 

 B.M. 1851, p. 108). 



C. viridula, L. Abundant at Pannal, flying about earth- 

 banks in 1870 ! 



C. Austriaca, Fab. Mr. F. Smith has taken it freely in 

 Yorkshire (Mon. Chrys., Ent. Ann. 1S62; p. 92). 



ACULEATA. 



The Hymenoptera have usually been divided into two great 

 divisions : L The Terebrantia, comprising all the preceding 

 groups; and II. The Aculeata, including the four succeeding 

 ones. 



The Aculeata include all the Social species — Ants, Wasps, 

 and Bees — as well as a large number of soHtary species. In July 

 1852 Mr. F. Smith collected aculeata round Wakefield, and as 

 the result of his investigations gave a complete list of the species 

 he met with (5 saw-flies and 69 aculeata), in the Zoologist for the 

 same year (x. 3625-6). Therein he stated that the first 

 impression left on his mind as constituting a marked difference 

 between Yorkshire and the London district^ was the immense 

 abundance of the social Hymenoptera as compared with the 

 sohtary species, and also as compared with their occurrence near 

 London, or, in fact, in any district which he had investigated in 

 the South of England. On the borders of the woods the nests of 

 wasps were found in astonishing numbers, principally those of 

 Vespa vulgaris; those of V. rufa were not by any means 

 uncommon; and those of V. Notvegica were also occasionally to be 

 met with, as well as of V. arborea. Several of the species of 



