Preliminary CnhtJogxe of British Cecidomyidae. 357 



*49. M. joannisi Kieffor, 1896-2, p. 116; 1913-2, p. 62. 



Gall, stem of Poa nemoralis. Houard, 263. 



Northumberland, Warkworth. Durham, between 

 Wolviston and Billingham. Lancashire, Grange-over- 

 Sands. 



*50. M. ventricola Klibsaamen, 1899, p. 566 {OligofropJms); 

 Kieffer, 1913-2, p. 62. 



On Molinia caendea. Houard, 249. 



Northumberland, between Whitfield and Langley. 

 Lancashire (Grinishaw). Yorkshire, on all the Cleveland 

 moors. 



*51. M. hordei Kieft'er. 1909. p. 9 (gall)t; Kieffer, 1913-2, 

 p. 62. 



On Hordeion vtdgare, = Cecidomvid, Houard, 347. 

 Durham, between Vigo and Birtley. 



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



On Bromus erect iis. 

 Durham. Gibside. 



Chortomyia Kieffer, 1913-2, p. 63. 



53. C. hellwigi Elibsaamen, 1912, p. 217 {Pooniyia); 

 Kieffer, 1913-2, p. 63. 



On stems, Brachypodiions sylvaticum. = Cecidomvid, 

 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 Riibsaamen, 1895, p. 180 {Oligotrophus) ; 

 Kieft'er, 1913-2, p. 63. 



On Molinia caendea. Houard, 250. 



Durham, Birtley Fell. Cheshire, Bidston Hill. 



55. C. poae Bosc, 1817, p. 133 {Cccid()nn/i(()\ Kieff'er, 

 1913-2, p. 63. 



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

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



