CATALOGUE OF BRITISH PLANT-GALLS 147 
Hymen- 
optera 
»f 
Lepidop- 
tera 
Diptera 
$ t 
Hymen- 
optera 
Salix viminalis Linn. 88. Common Osier. 
Margin of the leaf turned towards the lower surface and 
slightly rolled. 
PONTANIA SCOTASPIS Foerster 118 
Houard, No. 753. 
Fusiform swelling on the stem, 8 to 20 mm. long, with 
a large cavity in the woody tissue containing a caterpillar 
with brown head and black eyes. M. G. II. 
Cryptocampus ater Jurine 119 
Inchbald, 1864, p. 47. Houard, No. 741. 
Leaf margin rolled loosely inwards. See No. 87. 
PONTANIA LEUCOSTICTA Haitig 120 
Cameron, ii., p. 189. Houard, No. 752. 
Fusiform swellings on the older branches. See No. 115. 
Grapholitha Servilleana Dup. 121 
Houard, No. 744. 
Stem more or less swollen. See No. 94. 
Rhabdophaga saliciperda Duf. 122 
MacDougall, Journ. Bd. Agric., Oct., 1905. Houard, 
No. 745. 
Leaf margin rolled inwards. See No. 93. 
Perrjsia marginemtorquens Winn. 123 
Connold, Veg. Galls, pi. 81 ; Plant Galls, fig. 234. 
Houard, No. 749. 
Fusiform swellings on one-year twigs. See No. 95. 
Rhabdophaga salicis Sch. 124 
MacDougall Journ. Bd. Agric., Oct., 1905. Houard, 
No. 747. 
Salix caprea Linn. 106. Goat Willow. 
An ovoid or spherical swelling, about 5 mm. in diameter, 
on the under surface of the leaf; green, yellow, or whitish, 
sometimes tinted red, covered with white hairs. Its 
presence is shown on the upper surface by a rounded 
yellowish-brown spot bordered with red, or sometimes 
entirely red. Solitary or gregarious. Larva solitary. 
(Plate II. 4.) 
PONTANIA PEDUNCULI Hartig I2j 
Syn. acc. to Houard, Nematus curiicornis Cameron, 
N. bellus Zaddach, N. baccarum Cameron. 
Cameron, ii., pp. 198, 201 ; i., pi. 5, fig. 9. Connold, 
Veg. Galls, pi. no; Plant Galls, fig. 273. Houard, 
No. 815. 
Bean-like swelling on the leaf. See No. 90. Cameron 
observes that on S.capraea these galls are “somewhat 
