The Scottis/i Naturalist. 375 



deenshire to Perth. Mr. Binnie does not mention them. 

 (References as for S. cinerea). 



S. viminalis (Osier). Galls of C. marginemtorquem Bremi are 

 common on one or two low trees near Old Aberdeen 

 (T.S.N'., I., 193; T.A., I., 70). Mr. Binnie records 

 them from near Glasgow (B.I., 162). 



S. purpurea (Purple Osier) bears galls of C. Salicu, reaching a 

 length occasionally of two inches, and a thickness four 

 or five times that of the twig. From galls gathered near 

 Banchory, in Kincardine, in the beginning of May, I 

 reared the insects in the end of May (T.S.N., II.. 393 ; 

 T.A., I., 7). 



Quercus Robur L. 



1. Very frequently (so far as rny experience holds, wherever the 



tree is found) the lobes or portions of the leaf-margins 

 are folded back so as to protect a space underneath, 

 and the folded portion is thickened, slightly fleshy, and 

 yellowish. In the space live one or more larvae of 

 Dijilosis dryobia F.Lw. (C. pustularis Bremi) (T.A., I, 

 74; B.IL, 183). 



2. Mr. Binnie (B.IL, 179-81) records and describes as new, 



under the name Cecidompia Quercus sp.n., a midge 

 reared by him from among the leaves of slightly 

 arrested and twisted terminal shoots of oaks. The 

 pseudo-gall is not conspicuous till it withers, afrer the 

 larva has left it, to pupate in the earth. The midges 

 appeared in September. The galls are common near 

 Glasgow. Mr. Cameron has also found the acorn cups 

 distorted by larvae of a midge. 



FagUS sylvatica (Beech). The leaves of this tree very often 

 bear small erect galls, like rifle-bullets in form, about 3 

 by 1 mm., at first green, but becoming brown. They 

 are arranged usually along each side of the midrib ; and 

 sometimes two are joined at the base. On the lower 

 surface of the leaf is a raised piece, like a scale, opposite 

 each grail. The walls are thin. When the larvae are 

 full-fed, the galls break off and fall to the ground. 

 There are two forms, probably the work of the same 

 insect ; one having the surface covered with erect brown 



