TERRESTRIAL ACARI OF THE TYNE PROVINCE 8 1 



spur, especially a small spring form (^ i mm.) in 

 which this spur is hardly visible from above. 



148. Pergamasus alpestrls, Berl. 66,67. 



The local form is var. alpinus, Berl. Common. 

 Ireland, a single $ in moss. 



149. Pergamasus coniger, Hull. 66, 67. 



Exceedingly near alpestris : perhaps only a variety. 

 Yorkshire, Lancashire, Flintshire. 



150. Pergamastis processiferus^ Halb. 742 \x.. 



Ireland, in moss. 



151. Pergamastis lapponictis, Trag. 



Ireland, frequent in moss. 



152. Pergamasus diversus, Halb. 



Ireland, under stones. 



153. Pergamasus robustus, Oud. 66, 67, 68. 



A very common species. 

 Ireland, common. 



154. Pergamasus runciger, Berl. 66, 67, 68. 



Common, gregarious. 



Ireland (also var. armatus, Halb.) 



155. Pergamasus runcatellus, Berl. 66, 67, ()Z. 



Birtley, Hylton, Waldridge Fell, West Allendale, 

 Newham Bog. Yorkshire, Cumberland. Ireland 

 (apparently not common). 



156. Perga?nastis minor, Berl. 



Lancashire. 



157. Pergamasus parvulus, Berl. 66- 



Gibside; West Hartlepool. 

 Ireland (also var. dilatatelhis, Berl.) 



