ROEBUCK : ON YORKSHIRE OXYURA. 4 1 



Diaspasta contracta, (Hal) 

 Alysia manducator, (Pz.) 



Phaenocarpa ruflceps, (Nees.) 



Rev. T. A. Marshall's 

 DACNUSiDES. \ . Yorkshire " 

 Chaenon anceps, (Hal.) ^ . 



Coslinius niger, (Nees.) 

 Rhizarcha areolaris, (Nees.) 

 Dacnusa talaris, Hal. 



Tribe OXYURA. 



The Rev. T. A. Marshall, the compiler of the Ent. Society's 

 * Catalogue of British Hymenoptera : Oxyura,' (1873) enumerates 

 therein %2) genera and 373 species, included in 11 families: 

 Pfvctotrypidiz, Ceraphronidce, Bethylidcs, Dryinidce, EmbolimidcB, 

 HeloridcB, Belytidce, Diapriidcs, Scelionidcs, Platygastridce, and 

 Mymaridce. The vast majority of these insects are minute in size 

 and parasitic in habits. The literature, as usual, much scattered. 

 The chief authorities are Forster (Hyni. Studien, 2 Hefte, 

 1850-6), Curtis, Haliday, Nees ab Esenbeck (Hym. Ichn. afiEin. 

 monog. 2 vols., 1834), Ratzeburg (Die Ichn. d. Forstins.), Thom- 

 son (Ofversigt), Boheman, Dalman, Herrich-Schaffer, Westwood, 

 Walker (Ent. Mag.), Marshall (E.M.M. 'on some British Diapriid^,' 

 Feb., 1868, iv. 201) &c. See mention of 10 species in Marshall's 

 paper in the Ent. Ann. 1874, pp. 131 and 145. 



Collection and preservation of these atoms : see under 

 " Ichneumonid^," p. ■^(i. 



No Yorkshire species as yet placed on record. 



CHALCIDIDM. 



The literature of this group is in an extremely unsatisfactory 

 state, there not even being, as in allied groups, a S3monymic 

 or any other catalogue of British species of recent date. The 

 group has been studied by F. Walker (Monographia Chalciditum, 

 2 vols. 1839: Linnean Transactions, xx. 153; various B. M. 



