Preliminari/ Calalogtie of British Cecidomyidae. 375 



*159. P. lychnidis Hevden. 1861. p. 98 (Cecidomyia) ; 

 Kielfer, 1913-2, p. 78. 



On Lychnis alba. Houard, 2292. 



Northumberland, coast near Bamburgh. Durham, 

 Lamesley, Fencehouses. Lancashire, Ainsdale. 



160. P. mali Kieft'er, 1904-2, p. 345; 1913-2, p. 78. 



On Pyrus Malus. Swanton, 533 ; Houard, 2885. 

 Durham, near Stanley. 



*161. P. malpighii Kieffer, 1909, p. 21 (gall); 1913-2, p. 78. 



On Quercus. Houard, 1354. 



Northumberland, Warkworth, rare. Durham, Gibside. 

 Lanca.shire, Grange-over-Sands. Yorkshire, Leeds; 

 Bardsey. 



*162. P. miki Kieffer, 1909, p. 6 (gall) ; 1913-2, p. 78. 



On (a) Cenfaurea nigra and (6) C. Scabiosa, — Cecidomyid 

 sp. Houard, 5981. 



Northumberland, near Staward (a). ' Durham, Fat- 

 field (a), Billingliam (6), Hylton (6), and Gibside (a). 

 Cumberland, near Nenthead (a). Lancashire and West- 

 moreland, near Grange-over-Sands {a). Yorkshire, 

 Marton. 



*163. Perrisia sp. Bagnall and Harrison, 1916 (iii), p. 199. 



Head of {a) Centaur ea nigra swollen, breaking round 

 edges; larvae in large numbers, yellowish to pink. Also 

 in (6) C. Scabiosa. 



Northumberland and Durham, several records in (a) 

 and (6). Cheshire, Bidston Hill, plentiful {a). Cumber- 

 land, Nenthead (a). 



*164. Perrisia sp. Bagnall and Harrison, 1917 (v), p. 14. 



In old heads of Centaurea Scabiosa, larvae gregarious, 

 orange-red to copper-red, small ; not the above species. 



Northumberland, Warkworth. Durham, Catcleugh 

 Rock, near Sunderland ; Ryhope ; Fulwell ; Easington. 

 Also in old heads of C. nigra. 



