39 98 Proceedings of the Royal Irish Academy. 



Oribata lapidaria H. Lucas. 



"Westport, common under stones on the shore of Clew Bay, and swept off' 

 plants: Castlebar under stones on the lake-shore. 

 Distribution. — Finland to Africa (Algeria). 



Oribata globula Xieolet. 



Not uncommon. Clare Island, in moss ; Achill, in rotten wood and on 

 decayed fir cones ; Mulranny, under stones on the sea-shore. 



Distribution. — A widespread species ranging from Finland to Algeria. 



Oribata orbicularis C. L. Koch. 



A few specimens of an Oribata apparently referable to this species, or 

 perhaps to a variety of it, were found under stones on the sea-shore at 

 Mulranny, County Mayo. 



The shape is broader and stouter than in typical 0. orbicularis. In this 

 respect it agrees very closely with a mite described from Swedish Lapland 

 under the name of 0. monticola (88). In that species, however, the lamellar 

 and interlamellar bristles have very distinct secondary hairs, while in the 

 Mulranny form these are minutely setose. As the species is a somewhat 

 critical one it seems best to record these specimens as above. 



Distribution. — Finland to Italy. 



Oribata piriformis >acolet. 



A few specimens in moss from Knappagh Wood near Westport, August. 

 Distribution. — Europe. 



Oribata fuscipes C. L. Koch. 



Westport, one specimen in sphagnum at Coolbareen Lough, July ; and a 

 few under stones on the shore of Clew Bay. 



Distribution. — Finland 'Xordenskiold) ; Germany; ? North America 

 (Michael); England (Epping Forest, Michael); Scotland (Forth Area, 

 Evans). 



Oribata setosa C. L. Koch. 



Achill Island, swept off conifers ; Mulranny sandhills ; Westport, 

 common on furze, and in sphagnum. 



The Irish specimens vary considerably in size and in the shape of the 

 lamellae. The cusps of the latter are produced at the outer angle, but not 

 so markedly as in the form figured in " British Oribatidae " (plate vii, fig 3), 

 which doubtless represents an extreme form of the species. The prostig- 

 niatic organs vary in structure, in a number of specimens, obtained off furze, 



