128 TRANSACTIONS OF THE [ Sess. LXXxv. 
ordinary. It is difficult to realise this point until one has 
really tried to find them systematically. 
I have myself observed them on the following plants, 
though not always in special acarodomatia. If there are 
appropriate nooks or crannies somewhere on the plant which 
are fit for shelters, the mites naturally make use of them. 
I ought to mention also that these were all the benignant 
mites, not, so far as I could judge, the sucking “red 
spiders ” :— 
Anemone japonica, peony, larkspur, aconite, a garden 
form of Thalictrum minus, Helleborus viridis, Lirioden- 
dron tulipiferwm, common barberry, mahonia, Hypericum 
androsemum, H. calyconum, Gypsophila sp., Lychnis 
chalcedonica, Sidaleea malveflora, common lime tree, ivy- 
leaved geranium, Acer rubrwm, common sycamore, A. 
campestre, horse-chestnut, holly, Dictamnus fraxmella. 
They are very common both on Leguminose and Rosacee. 
I found the following plants to be regularly inhabited, 
viz.:—Broom, Vicia cracca, bean, kidney bean, Lwpinus 
mutabilis, Galega orientalis, Robinia pseudacacia, common 
laburnum, gooseberry, black currant (Phytoptus is not 
common at Newton), bramble, raspberry, loganberry, 
strawberry, common sloe, gean, cherry, Prunus padus, 
P. lawrocerasus, P. lusitanicus, Spirea ulmaria, SN. 
filipendula, S. aruncus, and three other species of Spirea, 
Geum wurbanum, Rosa canina, Cotoneaster frigidus, 
hawthorn, apple, pear, Pyrus aucuparia, P. fennica, 
Epilobium montanum, Deutzia crenata, Philadelphus sp., 
and Astilbe sp., Heraclewm spondylium, Eryngium plani- 
folium, ivy, Aucuba japonica, common elder, Viburnum 
opulus, honeysuckle, Valeriana pyrenaica, Cephalaria 
tartarica, Hchinops Ritro, Senecio vulgaris, Solidago vir- 
gaurea, Jerusalem artichoke, tansy, Aster corymbosus, 
Michaelmas daisy, and a tall garden variety of Achillea 
millefolium, Campanula carpatica, Lobelia cardinalis, 
Rhododendron ponticum, common azalea, Lysimachia 
vulgaris, Fraxvinus elatior, F. ornus, lilac, privet, Forsythia 
viridissima, Gentiana asclepiadea, Veronica longifolra 
var., Antirrhinum majyus, foxglove, Lamium maculatum, 
Monarda didyma, Polygonum virginicum, box, common 
nettle, Ulmus montanus, alder, hazel, birch, oak, beech, 
