H 4 
BRITISH GALLS 
Coleop- 
tera 
Diptera 
Acari 
Hymen- 
optera 
Rounded swellings on the branches. See No. gi. 
Saperda populnea Linn. 97 
Houard, No. 624. 
Leaf margin tightly rolled towards the lower surface, 
forming a compact, short (3 mm. by 2 mm.) gall, which is 
smaller at each end, coloured yellow, red, or purplish- 
brown, and bent like a bow. Usually gregarious and 
sometimes coalescent. but the margin is never continu¬ 
ously rolled. Each gall contains a single larva. 
Perrisia Inchbaldiana Mik. 98 
Syn. Cecidomyia clausiliae Bre. 
Connold, Plant Galls, fig. 323. Inchbald and Meade, 
i886£, pp. 223-22-. Houard, No. 627. 
Terminal leaves stunted and rolled. See No. 92. 
Perrisia terminalis H. Low 99 
MacDougall, Journ. Bd. Agric., Oct., 1905. Houard, 
No. 614. 
Slight swelling on the stem. See No. 94. 
RHABDOPHAGA SALIC1PERDA Dufour IOO 
R. Stewart MacDougall, Jour. Bd. Agric., Oct., 1905. 
Houard, No. 621. 
Arrested development of the terminal internodes ; the 
leaves are shortened and crowded, forming a rosette-like 
gall, which contains a pale red larva sheltered in a bundle 
of erect linear leaves. Sometimes all the leaves of the 
gall are atrophied and erect, and it then resembles a 
small fir-cone. 
RHABDOPHAGA ROSARIA H. Low IOI 
Syn. Cecidomyia ros aria H. Low. 
MacDougall, Gall-Gnats on Osiers and Willows, Journ. 
Bd. Agric., Oct., 1905. Houard, No. 613. 
Leaf margins tightly rolled, either upwards or down¬ 
wards. The affected part is but slightly swollen, about 
3 mm. long, glabrous, greenish or reddish. The galls are 
seldom coalescent, hence the deformity is not very ap¬ 
parent. Pubescent within. 
Eriophyes sp. 102 
Houard, No. 591. 
According to Houard, the mites most frequently found 
in this gall are Eriophyes truncatus Nal., E. tetano - 
thrix Nal., and Phyllocoptes magnirostis Nal. In all 
probability Connold’s Eriophyes marginatus (see Veg. 
Galls, pi. 58, and Plant Galls, fig. 324) is one of these. 
Salix alba Linn., var. vitellina Linn. 14. 
Margin of the leaf evenly rolled inwards until it meets 
