The Scottish Naturalist. 277 



ihave found them abundantly in Aberdeenshire, Forfarshire, and 

 Perthshire, and have no doubt that they will be found almost 

 wherever looked for. 



ULMUS CAMPESTRIS L. :— 



Galls of Phytoptus, doubtless the same species as makes the 

 galls just described on U. montana, are common in the same 

 localities as the latter, and are exactly similar in all respects. 

 They have been described from this tree from Gotha, Wurzburg, 

 and the Tyrol by Dr. Thomas, and from Weidling in Austria by 

 Dr. Fr. Loew. 



JUGLANS REGIA L. :— 



Erineum Juglandinum Pers. was sent me in the month of June 

 by Dr. Buchanan White from Perthshire, where he had gathered it. 

 It is made by a species of Phytoptus, like the other Erinea. 

 Greville described it under the name E. subulatum in his Mono- 

 graph of the genus (p. 75, /. //"., / 4), and under the name 

 E. Juglandis D.C. in his " Mora Edin" (p. 450), and in his 

 "Scot. Crypt. Flora" (K, t. 263, / 2), recording its occurrence 

 near Edinburgh. The gall is situated on the lower surface of the 

 leaves, and consists of a patch of yellowish-gray hairs, very closely 

 packed together ; the outlines of the patch are bounded by nerves 

 of the leaf, and it is thus often quadrangular in form, and may be 

 as much as 20 mm. in its long diameter. The hairs are slender, 

 simple, and pale, seldom showing any marked irregularity in form. 

 The patches generally lie in depressions of the lower surface, to 

 which correspond irregular convexities, of a paler or more yellowish- 

 green colour than the rest, on the upper surface. The mites live 

 among the hairs. 



QUERCUS ROBUR L. :— 



w. Galls of Aphilethrix solitaria Fo/isc, already recorded by Mr. 

 Cameron from near Glasgow (" Fauna and Flora of the West of 

 Scotland" p. 16), and by myself as sent me from Perth (" Sc. 

 Nat." IV., p. 17), were found by me in 1882 at Ballater on Dee- 

 side. I here describe the fresh galls. They are ovate budgalls, 

 usually sessile, with a few small scales around the base, narrowed 

 abruptly near the tip, where they end in a sharp prominent point. 

 Their surface is nearly smooth, and is green or greenish-brown. 

 In size they vary from 6 to 9 by 4 to 5 mm. On section the wall 

 is thin ; but in it one can distinguish a hypoderm of thin-walled 

 •cells, and an inner layer of polygonal cells with thick pitted walls. 



