215 
Eriosoma 7 setae Hausm. On Pyrus sp., but fortunately’ 
by no means comm 
- ulmi, Zinn. Oe Elm, rolling the leaves, abundant. 
Subfamily Pempuiernas. 
Pemphigus (Thecabius) affinis, Xalt. At the roots of Ranun- 
culus ‘2. very rare. Trail has fe oer this species from Poplar. 
rsarius, Linn. On Poplar, rare 
P; sn rbuiplaltt Koch. On Paglat (Frail, Wild Fauna of Kew, 
906.) 
Tetraneura ulmi, Zinn. On Elm, very rare. 
Subfamily Vacuninae. 
Vacuna dryophila, Schr. Not uncommon on Oaks. 
Subfamily HorMAPHIDINAE. 
Cerataphis lataniae, Boisd. On a palm in the Palm House. 
Subfamily PHYLLOXERINAE. 
Phylloxera quercus, Boyer. In 1915 an oak was very severely 
attacked by this species, the leaves becoming first yellow and then 
shrivelling 
Subfamily CHERMESINAE. 
Chermes abietis, Linn. On Spruce, forming characteristic 
galls. 
C. (Cnaphalodes) strobilobius, Kalt. On Larch twigs. 
Root-FEEDERS. 
ripe sdae menthae, Pass. On roots of Mentha aquatica, 1907 
(Prof. R. Newstead). I have seen the original specimens but 
have not found the species again. 
ALEURODIDAE. 
Asterochiton phillyreae, Hal. On Phillyrea and Crataegus. 
This species appears to be quite established within the Gardens. 
A. vaporariorum, Westw. The adults of this species are usually 
to-be found flying within the houses. 
PsYLLIDAE. 
Psylla buxi, Linn. An exceedingly common species on 
fect the leaves to form little clusters, inside which live the 
nymphs 
oft Férsteri, Flor. On Alnu 
P. mali, Schmid. On various ees of Pyrus and Crataegus, 
only too common 
Pp. pineti, Flor. On conifers in the Pin 
Psyllopsis fraxini, Zinn. On Ash, but apparently not common. 
P. fraxinicola, Forst. On Ash, common 
CoccrDAE. 
Diaspis zamiae, cape ee on Cycads in the Palm House, 
December, 1919, Z. EH. Gre 
