i 3 8 
BRITISH GALLS 
Diptera 
Nematoda 
Fungi 
fl 
Hymen- 
optera 
Nematoda 
Diptera 
Hymen- 
optera 
Diptera 
Poa nemoralis Linn. 93. Wood Meadow Gra^s. 
Medium or upper part of the stem swollen above a node. 
From the swelling issue numerous root-like filaments 
which curve around the stem. Each gall has a single 
cavity containing numerous larvae. M. G. 
Mayetiola poae Bose. 56 
Syn. Hormomyia poae Bose. 
Connold, Plant Galls, fig. 245. Houard, No. 264. 
Plant bulbous at the base of the stem. 
Tylenchus devastatrix Kuhn 57 
Fusiform swelling near the apex of the stem. See 
No. 34. 
Epichloe typhina Persoon 58 
Poa pratensis Linn. 112. Smooth Meadow Grass. 
Fusiform swelling on the stem. See No. 34. 
Epichloe typhina Persoon 59 
Festuca ovina Linn. 112. Sheep’s Fescue Grass. 
Irregular yellowish-green swelling on the stem, situated 
above the first or second node. M. G. Imago appearing 
in spring. 
ISOSOMA DEPRESSUM Walker 60 
Syn. Euura depressa Cameron. 
Connold, Plant Galls, p. 244. Walker, 1871, p. 451. 
Houard, No. 282. 
Minute oval or elongated pustules, 1 to 2 mm. long, on 
the under surface of the leaf. Green or bluish-black. 
Tylenchus graminis Hardy 61 
Hardy, 1850, p. 182. Houard, No. 283. 
Brachypodium sylvaticum Roem. and Schult. {gracile 
Beauv.). 111. Slender False Brome Grass. 
Top-shaped swelling on the stem in the vicinity of a 
node, causing a slight swelling outside the sheath. 
Chestnut-brown, becoming blackish. 
Cecidomyia sp. 62 
C. Zimmerman, 1907. Houard, No. 297. 
Agropyron repens Beauv. 112. Couch Grass. 
Spindle-shaped swelling on the stem. 
Aulacidea hieracii Bouch£ 63 
Syn. Aulax hieracii Sch. 
Connold, Plant Galls, p. 114. 
Terminal internodes remaining short and thickened, 
within a cigar-shaped sheath formed by imbricated leaves. 
The cavity is elongated, and contains a yellowish-white 
larva. M. G. 
Chlorops taeniopus Meigen 64 
Connold, Plant Galls, fig. 95. 
