48 
FAGUS SYLVATICA L. :— 
Descriptions of galls on this tree will be found in earlier volumes 
ofthis Magazine (7, g. 235, and VZ, p. 256-57), the makers being 
gall-midges. In September 1883, I found in Shambellie woods 
near Dumfries two forms of mite-galls, neither of which had 
been previously found by me in Scotland, though one of them 
(Erineum fagineum) was recorded in Greville’s “ Scot. Cryft. 
Flora” (¢. 250, f. 1) from the Southern counties, and is said by him 
to be of frequent occurrence. 
c. Erineum fagineum Pers. (£. lacteum Fries) consists of patches 
of short velvety hairs crowded together here and there on the 
lower surface of the leaf, at first pale dirty white or gray, afterwards 
passing into some shade of brown, or less frequently of red or 
purple. The spots are seldom large, and are usually slightly sunk 
in hollows of the leaf, occupying the inter spaces between the 
nerves. There is seldom any marks of their presence, except an 
occasional slight discolouration on the upper surface of the leaf.+ 
Several patches may exist on a leaf, but they show no tendency to 
fuse together, and are usually a little distance apart. The hairs 
are short, pyriform or obovate, and shortly stalked, with a thin 
membranous cell wall marked with longitudinal folds. This gall 
has been recorded from numerous localities on the continent of 
Europe. 
ad. Legnon circumscriptum Bremi; the galls of this mite consist 
of the involute and slightly thickened margins of the leaves, some- 
times extending almost entirely around the leaf, but usually only 
in parts of from 5 to 50 mm. in length. The affected portions 
form tubes not exceeding 1 mm. in diameter, and generally on 
cross section show about 1% turns. The interior of the tube 
contains some hairs, the usual marginal hairs of the leaf, among 
which live the mites, as usual belonging to the genus Phytoptus. 
The tissue of the gall is slightly more fleshy than that of the 
healthy leaf, but the colour is little changed, though becoming 
brown and dry rather earlier than the rest of the leaf. These galls 
were abundant on the same trees, and often on the same leaves as 
the Zrineum; probably they are not rare in Scotland in certain 
localities, though so inconspicuous as to be readily overlooked. 
AGROSTIS ALBA L. :— 
a. Galls of Zylenchus ? on the leaves (‘‘ Sc. Wat,” VI, 17). 
b. Pseudogalls of Brachycolus Stellarie Hardy on the young 
leaf-shoots, quite similar to, but less conspicuous than those on 
