Pack Bkresfokd and Foster — The Woodlice of Ireland. 183 



Species. 



A. Outer ramus of the uropods oval-oblong, always longer 



and wider than the basal segment, apex of telson 



obtusely pointed, nasatum. 



B. Outer ramus of the uropods trapezoidal, generally 



shorter and narrower than the basal segment. 



(a). Apex of telson broadly rounded or semi- 

 circular. 



(«.'). Inner ramus of uropod narrow, the same 

 width throughout, posterior angle of 

 the lateral plate of the first segment 

 of pereion truncated, .... i)alclieUu;m. 



(«■-). Inner ramus of uropod short and broad, 

 especially at its end where it spreads 

 out, colour uniform white (Dollfus), . alhun. 



(b). Apex of telson truncate. 



(6'). Body-surface smooth and shining, frontal 



lobe small, ...... vulgare. 



[b^). Body-surface rough and tubercular, frontal 



lobe prominent, ..... depressum. 



Armadillidium vulgare Latioille 





35 



34 



40 



39 









33 



36 



37 



38 



27 



28 



29 



32 









26 



25 



30 



31 





16 



17 



24 



23 



22 







15 



18 



19 



21 





9 



10 



15 



13 



20 





2 8 



7 



11 



12 







1 i 



5 



6 









3 













ExceediBgly common in the south- 

 eastern part of Ireland, this species 

 gradually gets scarcer as one goes north, 

 and is apparently entirely ahsent from 

 the north-western half of the country. 



In Meath and Louth it is not uncommon ; 

 and on the Umestone near Armagh City it 

 is plentiful (N. H. F.) ; but in Co. Down 

 it has been taken only at Portaferiy 

 (J. N. M.), Killough (A. W. S.), Down- 

 pati'ick (N. H. F.), and Seapatrick 

 (R. W.) ; while in Co. Antrim it has 

 been found only at Kilroot (11. W.), 

 and Magheramorne in large numbers 

 (A. W. S. aud N. H. F.). It occurs in 

 England and Scotland, and ranges over 

 the whole of Europe, and has been 

 taken in the neighbouring parts of 

 Asia and Africa, and also in a few 

 isolated locuhties in jS"ortli and South 

 America, and in Australia, where it has 

 jirobably been introduced (Budde-Lund). 



2S2 



