CATALOGUE OF BRITISH PLANT-GALLS 157 
Fungi Dense masses of long twiggy outgrowths on the 
branches, often springing from a large woody core, 
forming a “witch’s broom.” 
Exoascus turgidus Sadebeck 200 
Syn. Ascomyces turgidus Phil. 
Massee, Brit. Fung. Flora, iv., pp. 17, 18. 
Betula tomentosa Reith. and Abel {pubescens Ehrh.). 
72. White Birch. 
Acari On the lower surface of the leaf, usually in the axils of 
the lateral veins, a depression lined with cylindrical con¬ 
torted hairs. Slight swelling on upper surface. Phylle- 
rium tortuosum Greville. 
Eriophyes lionotus Nalepa 201 
Greville, 1824, ii., pi. 94. Houard, No. 1095. 
Alnus rotundifolia Mill. ( glutinosa Gaertn.). no. 
Alder. 
Lepidop- Slight swelling on a twig at the base of a petiole, some- 
tera times causing flexure beyond the point of attack. The 
internal cavity contains a single larva. 
Epiblema tetraquetrana Haworth 202 
Syn. PJdoeodes tetraquetra?ia Barrett. 
Connold, Plant Galls, fig. 21. Houard, No. 1123. 
,, Staminale catkins and young shoots deformed. 
Argyresthia Goedartella Linn. 203 
Syn. Argyresthia literella Haworth. 
Connold, Plant Galls, fig. 26. 
Acari On the lower surface of the leaf (very rarely on the 
upper) a mass of unicellular hairs, white at first, becoming 
brownish. The hairs are much swollen and club-shaped 
at the extremity. There is a slight swelling or blister on 
the upper surface of the leaf. Erineum alneum Persoon. 
Eriophyes brevitarsus Focken 204 
It is doubtful whether Connold’s illustrations (see Veg. 
Galls, pi. 49, and Plant Galls, fig. 23) are of this gall. 
Houard, No. 1133. 
„ Little subspherical red excrescences on the upper 
surface of the leaf, about the size of a hemp-seed, con¬ 
stricted at the base. These pimples open on the inferior 
surface by a mouth situated on a slight swelling surrounded 
by a circular depression. The interior is lined with 
cylindrical hairs that are not visible externally. Cepha- 
loneonpustulatum Bremi. (Plate XXL 2.) 
Eriophyes laevis Nalepa 205 
Connold, Veg. Galls, PI. 54; Plant Galls, fig. 24. 
Houard, No. 1128. 
