382 Messrs. R. S. WfwdW and J. W. 11. Harrison's 



205. P. tiliamvolvens {tiline Schr., gall), Riibsaamen, 

 1889-2, p. 55 {Cecidomyia) ; Kiefter, 1913-2, p. 82. 



On Tilia sp. Swanton, G18; Houard, 41G0. 

 Durham, Castle Eden Dene. 



*206. P. tortrix F. Loew, 1877, p. 6 {Cecidormjia) ; Kieffer, 

 1913-2, p. 82. 



On {a) Prnnus dome.slica, wild, and {h) P. spinosa. 

 Houard, 32G9, 3274, 3282. 



NoRTHUMHERLAND, near Minstoracres, {a) H. 32G9 and 

 3274.-|- Yorkshire, Bardsey near Leeds. Lancashire, 

 gall {a) H. 3274 only, near Lindale; Blackburn district 

 (G. W. Nixon), perhaps referable to P. sodalis or both 

 species. Mr. Biirkill, 1916, records this species from P. 

 spinosa, Devon. 



207. P. trachelii Wachtl, 1885, p. 195 (Cecidomyia); 

 Kietler, 1913-2, p. 82. 



On Campanula rotmidifolia. Swanton, 796, 797 ; Houard, 

 5513. 

 Durham, near Wolsingham. 



*208. P. traili Kieflter, 1909, p. 25 (gall); 1913-2, p. 82. 



On Ranunculus acris, = Cecidomyid sp. Houard, 2420. 

 Northumberland, Ovingham. Durham, nearPenshaw. 



209. P. trifolii F. Loew, 1874, p. 143 {Cecidomyia); 

 Kieffer, 1913-2, p. 82. 



On Trifolium spp. Swanton, 568, 569. 572. 577 ; Houard, 

 3589-91-96-64. 



Records from all counties excepting Westmoreland. 



*210. Perrisia sp. Burkill, 1916. 



On Trifolium pratense, leaflets folded into a pod resem- 

 bling the gall caused by P. trifolii, but each gall is occupied 

 by a white larva. 



Durham, near Hylton. Northumberland, Warkworth. 

 Recorded by Mr. Burkill from Derbyshire. 



•f Perrisia sal-alis may also occur in the gall 3274, but the presence 

 of 3269 enables one to definitely record P. torlrix. 



