67 
ends, about j-Xv7s-} inch, are externally like the other portions 
of the scape with the five ribs of the scape very strongly marked 
on them, and enclose a rather large cell; each is occupied by a 
blackish larva which passes through its metamorphoses in the 
gall; they seem to be muck subject to the attacks of parasites. 
The galls are abundant on the sandhills along the coast during 
the summer, and also occur at Braes of Gight. 
Nat. Ord. SCROPHULARINES. 
Veronica Chamedrys, L. (= Germander Speedwell). Galls of Cecidomyia 
Veronice Bremt. They consist of the terminal bud, which becomes 
pinkish-grey, a broadly-ovate mass about } inch in diameter, 
composed of closely imbricated leaves densely covered with pale 
woolly hairs; between the leaves occur numerous reddish-orange 
larvee of the midge: The galls are abundant throughout the 
district during autumn. Mites also occur in all the galls. 
Veronica Serpyllifolia, L. (Thyme-leaved Speedwell). The galls are 
flower buds which become dilated and swollen, reaching a size of 
yz-ie inch in diameter, and remain in an abortive state, never 
opening. The colour is paler than usual, but there is no other 
very noticeable change externally. The parts of the flower inter- 
nally become thickened and fleshy, and between them live one or 
more larve of Cecidomyia. Several galls occur in each inflorescence 
usually. In Rubislaw Den, near Aberdeen. 
Rhinanthus crista-galli L. (= Yellow Rattle). The whole plant, or part 
of it, is stunted, twisted, and has the leaves crowded together, but 
otherwise they hardly differ from those of a healthy plant; among 
the bases of the leaves live numerous larvex of a Cecidomyia that L 
have not yet succeeded in rearing. Affected plants are common 
on Scotston Moorin July. This can hardly be ranked as a true 
gall, as the result produced by the presence of the larve is so 
slight. 
Nat. Orv. Lapirz. 
Thymus Serpyllum L. (Thyme) A. The whole plant assumes a woolly 
appearance and a more compact habit, and the leaves are all 
thickly covered with white woolly hairs, especially the ends of 
the branches where round knobs (bud-galls) about + inch in 
diameter are found. Between the leaves live multitudes of mites 
—Phytoptus (= Calycophthora Serpylli Am.), and sometimes one or 
at orange larva of Cecidomyia. The galls are abundant every- 
where. 
B. A fiower bud becomes inflated te about twice the ordinary size 
and never flowers, but undergoes little change of form or of 
appearance. On removing the calyx a sac appears, ovate, blunt, 
—‘’¢ inch, green with the narrow end pink, thin walled, and enclos- 
ing a large cell inhabited by an orange larva of Cecidomyia. These 
galls are common in July on the sandhills on Old Aberdeen Links, 
but are very inconspicuous, and have to be sought for. Frequently 
from two to twelve of the flowers on a stalk are affected. 
Nat. OrD. PoLYGoNER. 
_ Polygonum viviparum, L. (= Viviparous Bistort). Galls of Cecidomyia 
ha Persicarie L.; they consist of the leaf margins which become revo- 
ae lute, thick, fleshy, and reddish-brown or yellow. Usually both 
margins are affected along part or the whole of the leaf. The 
larvee (orange) undergo their metamorphoses (at times at least) in 
5 
