2 l8 
BRITISH GALLS 
Homop- 
tera 
Diptera 
> 5 
) > 
y i 
ing on the inferior surface is surrounded by hairs. The 
well-known “ nail” gall. (Text, Fig. 22.) 
EriophYes tiliae Pagenst 622 
Connold, Veg. Galls, pi. 68 ; Plant Galls, fig. 148. 
Houard, No. 4162. 
MALVACEAE 
Malva sylvestris Linn. 91. Common Mallow. 
Leaves more or less crinkled, the margins turned down¬ 
wards. Sometimes the flower buds are also deformed. 
Aphis yellow or pale green, head brown or reddish 
between the antennae. 623 
Aphis malvae Koch 624 
Buckton, ii., 42. Houard, No. 4182. 
HYPERICACEAE 
Hypericum perforatum Linn. 101. Common St. John’s 
Wort. 
Apical leaves swollen, carinated at the base and tinted 
with red. The white larvae live between them. M. E. 
Perrisia serotina Winn. 625 
Syn. Cecidomyia serotina Wtz. 
According to Kieffer (Ann. Soc. Ent. France, 1901, 
p.341), the galls described by Trail (Scot. Nat., II., 1873, 
p. 31) as caused by this species are those of P. hyperici 
Bremi. 
Houard, No. 4211. 
Apical leaves bunched together, slightly deformed, but 
neither incurved nor carinated. Larvae red. M. G. 
Perrisia hyperici Bremi 626 
Syn. Cecidomyia hyperici Bremi. 
Trail, Scot. Nat., II., 1873, p. 31. Houard, No. 4212. 
Hypericum liumifusum Linn. 100. Trailing St. John’s 
Wort. 
Apical leaves swollen. See No. 625. 
Perrisia serotina Winn. 627 
Connold, Plant Galls, p. 245. Houard, No. 4196. 
Apical leaves bunched together. See No. 626. 
Perrisia hyperici Bremi 628 
Connold, Plant Galls, p. 245. 
Hypericum pulchrum Linn. in. Small St. John’s 
Wort. 
Apical leaves swollen. See No. 625. 
Perrisia serotina Winn. 629 
Houard, No. 4203. 
