430 A HISTORY OF RECENT CRUSTACEA 
there may be mentioned Tenby, Ventnor, Tunbridge Wells, 
and Cissbury Camp near Worthing. Probably the little 
white slow-moving woodlouse finds its food in the for- 
micarium, and pays for its board and lodging by act- — 
ing as a scavenger. The ants when disturbed leave 
their guests to shift for themselves, and do not carry 
them off along with their own helpless larve. There 
are two other species of the genus, one of them a cave- 
dweller. 
Oniscus, Linnzeus, 1767, occupies now a humble and 
limited position in the sub-order of the Isopoda, the whole 
of which it at one time embraced. Oniscus asellus, aucto- 
rum, is very common throughout Europe and in North 
America. There seems no reason to relinquish the 
specific name in favour of the later Oniscus murarius of 
Cuvier. The other species found in Great Britain, Onscus | 
fossor, Koch, is smaller, duller in colour, and more closely 
tuberculate. Oniscus Simonii, Budde-Lund, occurs in the 
South of France; Oniscus punctatus, G. M. Thomson, in 
New Zealand. 
Philoscia, Latreille, 1804, to be pronounced Philoskia, 
and meaning ‘a lover of shade,’ has a name which would 
probably be appropriate to every genus in this sub-order. 
Budde-Lund gives the description of twenty species, with 
the names of three more. That which he describes as 
Philoscia longicornis is in fact Philoscia Couchti, Kinahan, 
a maritime species which he elsewhere supposes possibly 
to belong to Ligidium. Besides inhabiting the coasts of 
Devon and Cornwall, Philoscia Couchit appears to be found 
all round the Mediterranean. It runs fast and is very 
shy. The body is smooth as in the rest of the genus, and 
the integument is not very firm. Philoscia muscorum 
(Scopoli) is very common in the South of England and in 
many parts of Europe. Budde-Lund says that Leach was 
mistaken in saying that it had been found in Sweden. 
Philoscia pubescens (Dana) is found in New Zealand. 
Philoscia pulchella, Budde-Lund, is identified by Dollfus 
with his own earlier described Philoscia elongata. Dollfus 
also establishes Philoscia corsica, 1888, inhabiting the 
