Preliminary Catalogue of British Cecidomyidae. 357 



*49. M. joannisi Kielier, 1896-2, p. IIG; 1913-2, p. 62. 



Gall, stem of Poa nemoralis. Houard, 263. 



Northumberland, Warkwoith. Durham, between 

 Wolviston and Billingham. Lancashire, Clrange-over- 

 Sands. 



*50. M. ventricola Kiibsaamen, 1899, p. 566 {Oligotrophus) ; 

 Kieffer, 1913-2, p. 62. 



On Molinia caeridea. Houard, 249. 



Northumberland, between Whitfield and Langley. 

 Lancashire (Grinishaw). Yorkshire, on all the Cleveland 

 moors. 



*51. M. hordei Kieffer, 1909, p. 9 (gall)t; Kieffer, 1913-2, 

 p. 62. 



On Hordeum vidgare, = Cecidomyid, Houard, 347. 

 Durham, between Vigo and Birtley. 



*52. Mayetiola sp. Bagnall and Harrison, 1917-3, p. 228. 



On Bromiis erectus. 

 Durham, Gibside. 



Chortomyia KiefEer, 1913-2, p. 63. 

 53. C. hellwigi Rlibsaamen, 1912, p. 217 {Poomyia); 

 Kieffer, 1913-2, p. 63. 

 On stems, Brachypodiums sylvaticiim, = Cecidomyid, 

 Swanton, 62, and Houard, 297. 



Northumberland, Warkworth, local. Durham, Pen- 

 shaw, Ryhope, Easington, and Horden, locally common. 

 Lancashire, Grange-over-Sands, probably not rare. York- 

 shire, Leeds district. 



*54. C. moliniae Rlibsaamen, 1895, p. 180 {Oligotrophus); 

 Kieffer, 1913-2, p. 63. 



On Molinia caeridea. Houard, 250. 



Durham, Birtley Fell. Cheshire, Bidston Hill. 



55. C. poae Bosc, 1817, p. 133 {Cecidomyid); Kieffer, 

 1913-2, p. 63. 

 On Poa nemoralis. Swanton, 56 ; Houard, 264. 

 t The generic position of this species is not yet certain. 



