Preliminary Catalogue of British Cecidomyidae. 353 



25. 0. bursarius Bremi, 1847, p. 52 (Cecidonu/ia) ; KiefEer, 

 1913-2, p. 50. 



Galling leaves of Glechoma hederacea. Swanton, 706; 

 Houard, 4809. 



Records from all counties. 



*26. 0. fagineus KiefTer, 1909, p. 7 (gall) ; 1913-2, p. 50. 



Leaves of Fagus, parenchymatous gall, ^ Cecidomyid. 

 Houard, 1156. 



Northumberland, rare, Wark worth. Durham, Lamb- 

 ton; Gibside. Yorkshire, Leeds. 



*27. Oligotrophus sp. Rubsaamen, Trotter. 



A very distinctive gall on beech leaves, previously only 

 known from Russia and Asia Minor. Houard, 1157. 

 Northumberland, Ninebanks (Rev. J. E. Hull). 



*28. 0. hartigi Liebel, 1892, p. 283 {Hormomyia) ; KiefEer, 

 1913-2, p. 50. 



Leaves of Tilia, parenchymatous gall; local. 



Northumberland, Warkworth and Ovingham, sparingly. 

 Durham, Gibside, local ; Castle Eden Dene. Cumberland, 

 near Alston. Lancashire, Grange-over-Sands. York- 

 shire, Leeds. 



*28a. 0. loewianus Kieffer, 1909, p. 4 ; 1913-2, p. 50. 



On Car ex arenarius. 

 Northumberland, AVark worth. 



*29. 0. reaumurianus F. Loew,t 1878, p. 387 {Hormomyia) ; 

 Kiefter, 1913-2, p. 50. 



All interesting gall on leaves of Tilia spp. 

 Yorkshire, Gunnergate, on one tree only. Also re- 

 corded by Mr. Burkill from W. Gloucestershire. 



*30. 0. tympanifex KiefEer, 1909, p. 6 (gall); 1913-2, p. 50. 



Li leaves of Corylus, parenchymatous gall, = Cecido- 

 myid, Houard, 1061. 



Local, though apparently widely distributed; records 

 from all counties. 



t Referable to the genus Didyomyia Rubsaamen, characterised by 

 Kieffer as insufficiently described. 



