CATALOGUE OF BRITISH PLANT-GALLS 137 
Fungi 
Diptera 
* > 
Homop- 
tera 
Fungi 
Nematoda 
Fungi 
Avena pubescens Huds. 94. Downy Oat Grass. 
Fusiform swelling on the stem. See No. 34. 
Epichloe typhina Persoon 48 
Phragmites communis Trin. 104. Common Reed 
Lateral branches shortened, walls of the terminal inter¬ 
nodes thickened and hardened. Interior of the haulm 
filled with a blackish grumous mass in which are reddish- 
yellow larvae, each living in an isolated and distinct 
gallery. 
Lasioptera arundinis Schiner 49 
Connold, Plant Galls, p. 246. Houard, No. 241. 
Isolated or grouped growths in the interior of the haulm, 
quite invisible externally. Each is firmly attached to the 
inner wall, and about 7 mm. long. Surface rough, pale 
yellow or brown, soft at first, becoming very hard at 
maturity. Each gall contains a white larva. M. G. 
Perrisia inclusa Frauenfeld 50 
Syn. Cecidomyia inclusa Frauenfeld. 
Connold, Plant Galls, p. 246. Houard, No. 245. 
Terminal fusiform swelling attaining the size of the 
middle finger. The axis of the stalk is shortened because 
of the arrested development of from ten to fifteen terminal 
internodes. The central cavity, 2 to 3 mm. in diameter, 
50 to 80 mm. long, has very thick and woody walls. It 
contains a single larva. M. G. 
Lipara lucens Meigen 51 
Connold, Veg. Galls, pi. 32; Plant Galls, fig. 258. 
Houard, No. 238. 
Small depressions on the upper surface of the leaf, which 
is often powdered with yellow dust when the Aphides are 
numerous. Aphis bright green, more or less covered with 
yellow meal; cornicles dark grey, very small. 
Hyalopterus arundinis Fabr. 52 
Buckton, ii , 112. Houard, No. 247. 
Cynosurus cristatus Linn. 112. Dog’s-tail Grass. 
Fusiform swelling at the apex of the stem. See No. 34. 
Epichloe typhina Persoon 53 
Poa annua Linn. 112. Annual Meadow Grass. 
Plant bulbous at the base of the stem. 
Tylenchus devastatrix Kiihn 54 
Connold, Plant Galls, p. 191. Houard, No. 260. 
Fusiform swelling near the apex of the stem. See 
No. 34. 
Epichloe typhina Persoon 55 
Massee, Textbook of Plant Diseases, p. 125. 
