76 Proceedings of the Royal Physical Society. 
Habitat—Under stones, dead leaves, etc., common. It is 
smooth and shining, and of a greyish-purple colour, with 
dark blotches arranged in an indistinctly biserial manner. 
It runs very quickly. The outer antenne are eight-jointed ; 
uropods exserted; outer ramus falciform, about twice the 
length of the uropods, inner ramus shorter and more slender. 
Another species, Philoscia couchit (Kinahan), distinguished 
from the last by its uniform lead-grey colour, by the inner 
ramus of the uropod being not more than one-fourth the 
length of the outer, and a few other points of difference, has 
been recorded from Banff by Thomas Edward, which is the 
only Scotch record I can find for that species. 
Philougria, Philougria riparia (Koch). 
Kinahan. 
Itea riparia, Koch, in Cont. Panz. Ins. Deutschl., 162, 17. 
1857. Philougria celer, Kinahan, Nat. Hist. Rev., iv., p. 281, pl. 22, 
figs. 1-4. 
1868. ie riparia, Bate and Westwood, Joc. cit., il. 
Habitat.—Under stones, usually in damp places; frequent 
and generally distributed. This is a small species, being 
scarcely an eight of an inch in length. It is of a claret-brown 
colour, with smooth and polished upper surface. There are 
three species of Philougria recorded as British—P. rosea, 
P. vivida, and the one here described. PP. rosea has been 
recorded for Banff by Thomas Edward, and for Tarbert, Loch 
Fyne, by myself; but, so far as I know, there is no record 
of its occurrence for the Edinburgh district. It is usually 
of a rose colour, with a median white line along the dorsal 
surface of the body. I find no record of P. vida for Scot- 
land. The species of Philougria are distinguished from 
other land Isopods by the nine or ten jointed anterior 
antenne terminating in a pencil of hairs. The following 
are a few of the many places where P. riparia has been 
observed — Arthur’s Seat, Inchkeith, Cramond Island, St 
Margaret’s Hope, and Largo. It was also obtained by 
Edward at Banff, and by myself at Rothesay. Platyarthrus 
hoffmannseggit, Brandt, a curious little white-coloured Isopod 
found in ants’ nests, has been recorded from Banff by Thomas 
