2l8 



BRITISH GALLS 



Homop- 

 tera 



ing on the inferior surface is surrounded by hairs. The 

 well-known " nail" gall. (Text, Fig. 22.) 



EriophVes tiliae Pagenst 622 

 Corinold, Veg. Galls, pi. 68; Plant Galls, fig. 148. 

 Houard, No. 4162. 



MALVACEAE 



Malva sylvestlis Linn. qi. 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. loi. Common St. John's 

 Wort. 

 Dlptera 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., IL, 1873, 

 p. 31) as caused by this species are those of P. hypeyici 

 Bremi. 



Houard, No. 421 1. 



II Apical leaves bunched together, slightly deformed, but 



neither incurved nor carinated. Larvae red, M. G. 



Perrisia hvperici Bremi 626 

 Syn. Cecidomyia hyperici Bremi. 

 Trail, Scot. Nat., II., 1873, p. 31. Houard, No. 4212. 



Hypericum humifusum Linn. loo. 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. iii. Small St. John's 

 Wort, 

 i Apical leaves swollen. See No. 625. 



Perrisia serotina Winn. 629 

 Houard, No. 4203. 



