igS 
BRITISH GALLS 
Homop- 
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Homop- 
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Diptera 
Prunus Cerasus Linn. 36. Dwarf Cherry. 
Bark of stein and branches cankered and destroyed in 
some parts, thickened in others. See No. 467. 
468 
Connold, Plant Galls, fig. 89. 
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 ?nollis Linn., and Alopecurus 
pratensis Linn. 
Minute glossy nail-like projections, 3 to 4 mm. high, on 
the upper surface of the leaf, gregarious, but not often 
coalescent, greenish-yellow, red or reddish-brown, open¬ 
ing on the inferior surface. June to September. 
Eriophyes padi Nalepa 470 
Syn. Phytoptuspadi Nalepa. 
Connold, Plant Galls, fig. 65. Houard, No. 3314. 
Bark cankered and thickened. See No. 467. 
471 
Massee, Textbook of Plant Diseases, p. 127. 
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. MeadowSweet. 
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. 
