— =e 
47 
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 Aphilothrix solitaria Fonsc., already recorded by Mr. 
Cameron from near Glasgow (“ Fauna and Wlora of the West of 
Scotland, p. 16), and by my self as sent me from Perth (S¢o¢. 
Nat., 1V., 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 4to 5mm. 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. 
The central cavity is rather large, and is lined with thin-walled 
cells that contain protoplasm and starch as food for the larva 
apparently. The insects emerged in August. 
x. Galls of Aphilothrix albopunctata Schla., already described in 
this Magazine. 
y. Galls of Aphilothrix collaris Hart. were found by me in 
June 1882, at Parkhill, north from Aberdeen, and also at 
Banchory Ternan on Deeside. They belong to the group of bud- 
galls, and are very inconspicuous, as they remain hidden among 
the scales. The gall is spindle-shaped or ovate, 4 by 2 mm., and 
ends in a conical point. It’s surface is brown, and its wall is thin 
and dry. All those found were empty. This gall is said by 
Adler to be the work of the spring brood of Andricus curvator 
Hart., which is very common in Britain, and has already been 
described (“ Sc. Wat,” L., 193; ¢)- 
z. Galls of Aphilothrix autumnalis Hart. have been already 
recorded by Mr. Cameron from near Glasgow. I found one or 
‘two specimens beside the Dee near Aberdeen in October 1882. 
The gall is ovate, 3°5 by 2°5 mm., and ends in a minute wart. 
The surface is brown and smooth, with faintly marked longitu- 
dinal ridges. The outer layers of the wallin the fresh state are 
slightly fleshy, and adhere closely to the hard inner shell. The 
gall is very inconspicuous among the scales. In the end ‘of 
autumn it falls to the ground. Adler believes it to be the work of 
the “alternate generation” of the insect that makes the “ S/& 
Cotton gall of the oak”—viz., of Andricus ramuli L., already 
described in these notes(“ Sc. Waz., //., ~. 128, 0). 
