191 1- Stephens. — Some Terrestrial I sopodafotmd in \(^\\. 195 



SOME TERRESTRIAL ISOPODA FOUND IN COS. 

 DUBLIN AND WICKLOW DURING 1911. 



BY NORMAN E. STEPHENS. 



The following is a list of species of Woodlice which I have 

 collected since the publication of " The Woodlice of Ireland," 

 by Pack-Beresford and Foster ^ ; I have recorded only the 

 rarer species (unless where peculiar varieties have occurred) 

 which came under my notice during a stay of nearly three 

 months in Greystones, and on previous and subsequent 

 occasions in Co. Dublin. Three of the species mentioned, 

 namely, R. Mengii, T. pygmaeus, and P. dilatatus were not 

 hitherto known to exist in Co. Wicklow, although suspected 

 in the case of the latter two. All except one specimen of 

 P. dilatatus were found in the open air. 



Trichoniscus pusillus, Brandt. 



I took a peculiar!}' marked specimen of this common woodlouse in a 

 rabbit-burrow near Templecarrig, Co. Wicklow, in April last. The meso- 

 some is narrower and the metasome broader than in typical T. pusillus. 

 The colour is of a rich cobalt blue with the usual ramificated markings on 

 the body. The overgrowth of briars prevented me from making a further 

 examination of this spot in the summer months. 



Trichoniscus roseus, Koch. 



Co. Wicklow : Glen of the Downs, Greystones, and at certain damp spots 

 on Bray Head. Co. Dublin : in an old garden in the city. 



Trichoniscus pygmaeus, Sars. 



Six specimens of this minute woodlouse from a rabbit -burrow at 

 Templecarrig, and one at Windgates, Co. Wicklow. 



Haplophthalmus Mengii, Zaddach. 

 Plentiful under a large stone implanted in sand on Bray Head, and 

 under stones at Greystones, Co. Wicklow. Co. Dublin : Rathmines. 



Oniscus asellus. Linn. 

 I took a beautiful pale orange coloured specimen under stones at the 

 ruined cottages on Bray Head. 



' Proc. R. I. Acad., vol. xxix. 



