81 
ACARIDA— 
All the gall-making mites in this district belong to the genus Phytoptus, 
Dujardin, but owing to their very small size (rendering the com- 
pound microscope necessary even to see them) aud to their uni- 
formity of aspect, the various species have not been described or 
named, though the diversity of the galls gives ground for believ- 
ing that there must be many species could we but distinguish 
them. Most of the galls have received names, and these names I 
will employ for accuracy of reference, as the galls are readily 
recognisable. Many of those which consist only of a growth of 
hair-like filaments from parts of the leaf were regarded by the 
earlier botanists as fungi, and were described by Fries aud others 
on the Continent, and by Greville in Scotland as such, under the 
generic name Erineum. Fée, ma monograph on Erineum, showed 
that they were of animal origin, and described many new species. 
Amerling, Bremi, Kirchner, Thomas, and others have also described 
many new forms of mite-galls on the Continent, but very little 
has been done in the matter in this country. Ihave found the 
following galls in this part of Scotland— 
Phytoptus Geranii on Geranium sanguineum' L. 
3 (=Ceratoneon vulgare ,, Acer pseudo-platanus L. 
Bremi = Volvulifex 
Aceris, Am. . 
3 (= Cephaloneon con- ,, Prunus spinosa L (A). 
filuens, Bremi) 
x, (=Ceratoneon attenua- ,, 33 iz (B), and on 
tum, Bremi) P. Padus L. 
n Pyrus Aucuparia Gertn, and 
P. Aria L. 
- (=Erineum Oxyacanthae),, Crataegus Oxyacantha L. 
7 Galium verum L (E)-and (F). 
a », Aparine L (B). 
35 » Ssaxatile (A). 
3 (=Calycophthora Ser- ,, Thymus Serpyllum L (A). 
pylli, Am.) 
(= Heliazeus Populi ,, Populus Tremula L (B). 
Kirch) 
ef ( = Batoneus Populi ,, pA + (C). 
Kirch) 
,, ( = Erineum Populinum, Fe es (D). 
Pers.) 
an ss ,, Salix caprea (H), on S. aurita 
(E), and on 8. repens (B). 
a —Calycophthora Avel- ,, Corylus Avellana L. 
lane Am.) 
o (=Erineum roseum Sch. ,, Betula alba L (E). 
-LE. betulinum, Sch.) 
” ”? ” (E). 
PA eC): 
(=Cephaloneon pustu- ,, Alnus glutinosa L (A). 
latum, Bremi.) 
~ (=Erineum alneum, Pers.) ds ai B 
”  (<Oribata geniculate, ,, Pinus sylvestris L. 
Latr.) 
