8) 9 
THE TERRESTRIAL ISOPODA (WOODLICE) 
OF YORKSHIRE. 
F. RHODES, 
Cartwright Hall, Bradford. 

THE Woodlice have been somewhat neglected by Yorkshire 
Naturalists. The following notes are intended to form a 
nucleus on which to base future records, and also to induce 
fellow naturalists in other parts of Yorkshire to take some little 
interest in this much neglected group of animals, so that we 
can form some idea of their distribution. Some few species 
appear to be distributed throughout the greater part of the 
British Isles. Others are local, probably from geological, 
climatic, or other causes. The reason for their absence or 
presence in a given locality is one of the things which should 
be worked out. 
Collecting Woodlice is a very simple and easy task, all it 
is necessary to have are a few small bottles containing a little 
weak spirit. Mr. R. Standen, of Manchester, advises 30 per 
cent. spirit to which has been added a little glycerine, in the 
proportions of a teaspoonful to four ounces of the spirit. This 
kills them, and at the same time keeps them limp, and they 
can alterwards be taken out and straightened, then placed in 
stronger spirit. I have found this formula to work admirably. 
I should take it as a very great favour if anyone would take 
the trouble to collect and forward me specimens from other 
parts of Yorkshire not mentioned in the following list, or other- 
wise get them identified and record them in The Naturalist. 
Specimens sent to me would be returned, if required, with the 
name affixed. All that is necessary in posting them is to take 
them, out of the spirit and place them in damp cotton wool in 
a small tin box, or otherwise in a small glass tube placed in a 
box. 
Woodlice are to be found in many and varied places, but 
chiefly in damp situations, under stones, logs, garden refuse, in 
greenhouses, in damp woods, under the bark of old trees, 
among tallen leaves, under moss and creeping plants, at the 
roots of grass, and on the top of old walls, also among the 
shingle along river and stream sides. 
FAMILY LIGIIDA. 
Genus Licta Fabr. 
LIGIA OCEANICA L.—This is the largest of our British Wood- 
lice, measuring from 20 to 30 mm. It is to be met with all 
along our Yorkshire coast wherever it can find a convenient 
hiding place. It may be looked for on wooden piers, on groynes, 
and under the shingle and refuse at high water mark. 
1916 Mar. 1. 
