362 Messrs. K. S. Bagnall and J. W. H. Harrisoirs 



on S. repens, rare. Lancashire, Freshfield, on S. cinerea, 

 rare. Also recorded by Mr. Burkill (on S. alba) from 

 Derbyshire. 



80. R. marginemtorquens Wiunertz, 1853, p. 223 {Cecido- 

 myia) ; Kieft'er, 1913-2, p. 70. 



On Salix spp. Houard, S. 51, Perrisia marginemtorquens. 

 Generally distributed; records from all counties except- 

 ing Westmoreland and Cheshire. 



*81. R. nervorum Kieffer {noduli Riibs.), 1895-2 {Diclie- 

 lomijia); 1913-2, p. 71. 



On Salix spp. Houard, S. 49. 



Durham, River Wear near Cox Green, on S. alba, Gibside 

 on S. aurita, and Ryhope on S. fragilis, rare. Lancashire, 

 Ainsdale and Freshfield, local, on young S. alba. North- 

 umberland, Ovingham and Warkworth, on S. cinerea, 

 S. alba and the var. vitellina. Yorkshire, Nunthorpe on 

 S. vitellina, also see Burkill, 1916, " Entomologist," p. 7, 

 on S. Cajprea. Also recorded by Mr. Burkill from Derby- 

 shire on S. alba and <S. cinerea, and from Surrey on S. 

 Caprea. 



*82. R. pierrei Kieffer, 1896-2, p. 218 {Berlieria); 1913-2, 

 p. 71. 



On Salix repens and S. cinerea, rare. Houard, S. 37. 

 Northumberland, near Warkworth. Durham, Birtley, 

 rare. 



*82a. R. pseudococcus, Riibsaamen 1890-2, p. 307 (Ceci- 

 domyia); Kiefl'er 1913-2, p. 71. 



Flat, broad larva under a scale-like covering on under- 

 side of leaves of Salix Caprea, gregarious. 



Durham. Plentiful on isolated trees in Ryhope Dene 

 and Hesleden Dene. 



*82b. R. pulvini Kieffer {salicina Giraud, non Schrank; 

 Magi? H. Loew non Meigen) 1891, p. 244 {Ceci- 

 domyia); 1913-2, p. 71. 



On Salix aurita and S. vitellina. Houard, S. 19. 

 Northumberland, Ovingham. 



