igS 



BRITISH GALLS 



Homop- 

 tera 



Acari 



Fungi 



Homop- 

 tera 



Diptera 



Prunus Cerasus Linn. 36. Dwarf Cherry. 

 Bark of stem and branches cankered and destroyed in 

 some parts, thickened in others. See No. 467. 



Connold, Plant Galls, fig. 89. 



468 



Prunus Padus Linn. 70. Bird Cherry. 



Leaves involute, crumpled, and swollen. Aphis yel- 

 lowish-green, with three greenish-olive stripes ; lower 

 abdominal rings stained ochreous red. 



Aphis padi Linn. 469 



Buckton, ii., 62. Houard, No. 3313. This aphis attacks 

 various grasses on the Continent, including Agropyron 

 repens Beauv., Holcus mollis Linn., and Alopecurus 

 pratensis Linn. 



Minute glossy nail-Uke projections, 3 to 4 mm. high, on 

 the upper surface of the le^, gregarious, but not often 

 coalescent, greenish-yellow, red or reddish-brown, open- 

 ing on the inferior surface. June to September. 



Eriophyks padi Nalepa 470 



Syn. Phytoptus padi Nalepa. 



Connold, Plant Galls, fig. 65. Houard, No. 3314. 



Bark cankered and thickened. See No. 467. 

 Massee, Textbook of Plant Diseases, p. 127. 



471 



Fruit swollen and deformed. See No. 462. 



ExoASCUs PRUNi Fckl. 472 

 Massee, Brit. Fung. Flora, iv., p. 15. 



Densely fasciated twigs on the branches. See No. 461. 



ExOASCUS DEFORMANS Fckl. 473 



Massee, Brit. Fung. Flora, iv., p. 15. 



Spiraea Ulmaria Linn. 112. Meadow Sweet. 



Leaf margin rolled inwards, bent, and discoloured. 

 Aphis large, shining green, cornicles green or tipped with 

 black. 



Macrosiphum ulmariae Sch. 474 



Syn. Siphonophora pisi Kalt. 



Buckton, i., p. 134. Houard, No. 2833. 



Small hemispherical yellowish or carmine swellings 

 on the upper surface of the leaf, often very numerous ; 

 the swellings on the inferior surface are cylindroconic. 



