BRITISH GALLS 
136 
Fungi 
Hymen- 
optera 
Acari 
Fungi 
Homop- 
tera 
Fungi 
Diptera 
Fungi 
Agrostis tenuis Sibth. (vulgaris With). 112. Fine 
Bent Grass. 
Fusiform swelling on the stem. See No. 34. 
Epichloe typhina Persoon 
Massee, Textbook of Plant Diseases, p. 125. 
Ammophila arenaria Link. 64. Mat Grass. 
Haulm thickened at the summit, where the internodes 
are shortened. The imbricated leaves are often not larger 
than the enlarged sheath, the whole forming a pyriform 
mass. Larva pupates in the gall, imago appears the 
following April or May. 
ISOSOMA HYALIPENNE Walker 
Syn. Eurytoma hyalipennis Walker. 
Connold, Veg. Galls, pi. 41 ; Plant Galls, fig. 155. 
Houard, No. 211. 
Haulm swollen at the sheath ; the epidermic cells hyper¬ 
trophied and assuming various shapes, usually either 
looped or twisted like a gimlet; hyaline at first, becoming 
brownish. M. G. 
? Tarsonemus spirifex Marchal 
Connold, Plant Galls, fig. 156. Swanton, Knowledge, 
June, 1910. 
Deschampsia caespitosa Beauv. 112. Tufted Hair 
Grass. 
Fusiform swelling on the stem. See No. 34. 
Epichloe typhina Persoon 
Holcus mollis Linn. 110. Creeping Soft Grass. 
Leaves erect, tufted. They “embrace each other at 
their bases like those of a sedge. In this manner a kind 
of boat is formed for the protection of the colony.” Aphis 
yellow or shining black, mealy. 
Brachycolus STELLARIAE Hardy 
Hardy, North Brit. Agriculturalist, pt. ii , p. 788. 
Buckton, ii., p. 148. Houard, No. 218. 
Fusiform swelling on the stem. See No. 34, and Plate 
XVI. 3. 
Epichloe typhina Persoon 
Massee, Textbook of Plant Diseases, p. 125. 
Holcus lanatus Linn. 112. Meadow Soft Grass. 
Swelling on the stem in the immediate vicinity of a 
node, under the sheath of the corresponding leaf, tinted 
violet or purple. Larvae white, gregarious. 
Mayetiola holci KiefTer 
Whitehead and Gray’s Report, 1887. Houard, No. 215. 
Fusiform swelling on the stem. See No. 34. 
Epichloe typhina Persoon 
Massee, Textbook of Plant Diseases, p. 125. 
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43 
44 
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