ROSACRAE 
201 
Diptera Lea\ es distorted, midrib swollen. See No. 479. 
Perrisia plicatrix TL Low 490 
Houard, No. 3025. 
Fragaria vesca Linn. hi. Wild Strawberry. 
Nematoda Stem deformed, much swollen, with numerous buds. 
The abnormal branches are much enlarged, sometimes 
fasciated, often remaining separated, and the plant then 
resembles a small cauliflower. Leaves more or less de¬ 
formed, with one lobe instead of three. The parasites 
swarm in the tissues. April to September. 
Aphelenchus fragariae Ritz.-Bos 491 
Connold, Plant Galls, fig. 287. Houard, No. 3055. 
,, Gall superficially resembling the preceding, but the 
thickened parts of the stem are white, the leaves are 
somewhat yellowish, and the roots not so abundant. The 
eelworms live between the sheaths and the stem. 
Aphelenchus Ormerodis Ritz.-Bos 492 
Houard, No. 3056. 
Potentilla erecta Hampe. 112. Common Tormentil. 
Hymen- Ovoid or spherical swellings on the stem, rarely on a 
optera petiole, consisting of a single cell or numerous larval 
cells which never become fused. Greenish-yellow, red¬ 
dish or purple. 
Xestophanes brevitarsus Thoms. 493 
Syn. Xestophanes tormcntillae Cam. 
Connold, Veg. Galls, pi. 43; Plant Galls, fig. 295. 
Houard, No. 3064. 
Potentilla reptans Linn. 99. Creeping Cinquefoil. 
,, Rounded swellings on the stem, sometimes in a bud, 
singly, about the size of a pea, forming a long fusiform 
swelling when coalescent; the surface cracks at maturity. 
Each cavity contains a single larva. M. G. Imago, May 
or June, II. 
Xestophanes potentillae Retz 494 
Syn. Aulax spiendens Hartig. 
Connold, Veg. Galls, pis. 13, 14, 129^ ; Plant Galls, 494^ 
fig. 92. Houard, Nos. 3060, 3061. 
Potentilla argentea Linn. 57. Hoary Cinquefoil. 
Rounded or fusiform swelling on the stem, surface 
usually mammillated ; plurilocular. 
Diastrophus Mayri Reinhard 495 
Connold. Plant Galls, p. 246. 
