Pack Beeesfoko and Foster — The Wnodlice of Ireland. 177 



sented in Ireland by one only, namely P. lioffmcmnseggii Brandt. The other 

 species of the genus is found in the Mediterranean region only. 



Platyarthrus hoiFmannseggii l!r;mdt. 





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Tills species is the •well-known blind 

 Woodlouse that is found only in ants' 

 nests. It is said by Prof. Budde-Lund 

 to inhabit tlie 'wliole of Europe ; but in 

 Great Britain it is apparently more or 



less u southern si^ecies, not baving been 

 taken further north than Oxford, though 

 it has been obtained in a couple of 

 localities in Scotland. In Ireland it 

 appears to have a south-easterly dis- 

 tribution, having been recorded only 

 from Glengariff, W. Cork (11. F. S.) ; 

 Cork (N.H. F.), and Cariigrohane 

 (R.A. P.), Mid Cork; Lisniorc (EF.S.), 

 Cappoqum (J. N. H.), aud Waterford 

 (H. AV. K.), Co. Waterford; Gores- 

 bridge, Kilkenny (D. 11. P. B.);Bagenals- 

 town (11. F. S.), and Tinnahinch 

 (11. A. P.), Co. Carlo w ; Leixlip. Co. 

 Kildare (E. F. S.) ; and Lucan, Co. 

 Dublin (J. N. H.) ; and close to Wexford 

 town, Co. AVexford (K.A.P.). 



ONISCUS. 



M. Budde-Lund describes only two species of the genus, as known to 

 himself, but he includes two more as possibly distinct species, out of many 

 that have been described. Both the species mentioned are found in Europe, 

 but only one has so far been taken in the British Islands. 



Oniscus asellus Linn. 







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The great variations of colour to 

 which this species is liable probably 



account for many of its synonyms, 

 which are numerous. 



It is one of the very commonest 

 species we have, and abounds in all 

 parts of Ireland. Though usually of a 

 dii'ty grey colour, wu find yellow and 

 even red-coloured specimens in many 

 parts of the country. M. Budde-Lund 

 describes this species under the name 

 of 0. murarhis Cuvier, and says that it 

 ranges all over Europe (though it is 

 found less commonly in the south), and 

 is found also in N. America and Green- 

 land, as well as one of the Azores. 



