Preliminary Catalogue of British Cecidomyidae. 361 



Apparently not uncommon; records from all counties 

 excepting Westmoreland. Also recorded by Mr. Burkill 

 from Derbyshire, and from Scotland. 



*74. R. clavifex Kiell'er, 1892-2, p. 441 {Cecidoniyia) ; 

 1913-2, p. 70. 



On Salix spp. Houard, S. 14. 

 Lancashire, Ainsdale, rare. 



*75. R. dubiosa Eaefl'er n. nov. for Cecidomyia duhia Kieffer, 

 1892-2, p. 255; 1913-2, p. 70 {= Cecidomyia 

 griseicollis Zett. non Meigen). 



On S<dix spp. Houard, S. 41. 



Northumberland, Ninebanks, Warkworth. Durham, 

 ■ Waldridge. Lancashire, near Ainsdale. 



*76. R. giraudiana Kieffer {saliciperda Giraud ?ion Dufour), 

 1898-1, p. 159; 1913-2, p. 70. 



On Po'pulus alba; also known from P. tremula abroad. 

 Houard, 475. 



Lancashire, Ainsdale and Freshfielcl, only two examples. 



77. R. heterobia H. Loew {saligtia Hardy), 1850, p. 28 

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



On Salix s]ip. Houard, S. 10; Swanton, 88, 89 and 154. 



Northumberland, Warkworth, on S. alba. Durham, 

 Birtley, on S. repens, also affecting the male catkins ; 

 Waldridge, Swalwell ; Tinkler Fell, on S. Caprea. Lanca- 

 shire. Birkdale and Ainsdale. 



*78. R. iteobia Kieffer, 1890-3, p. 201 {Cecidomyia); 

 1913-2, p. 70. 



On Salix cinerea. Houard, >S. 11, Perrisia iteobia. 

 Northumberland, Ninebanks. Durham, near Blanch- 

 land. Lancashire, Ainsdale. Also from Scotland. 



*~9. R. karschi Kieffer, 1892-2, p. 251 {Cecidomyia); 

 1913-2, p. 70. 



On Salix spp. Houard, S. 34. 



Northumberland, Ninebanks, on S. cinerea, and 

 Warkworth, on S. cinerea and alba var. Durham, Birtley, 



