498 ON SOME NEW AND RARE BRITISH COLLEMBOLA 



Order COLLEMBOLA Lubbock 



Sub-Order ARTHROPLEONA Borner 



Family PODURID^ Lubb. 



Genus PODURA L. 



Podura aquatica L. 



Though this species is apparently a common one, and one 

 of wide distribution, I have seen but a single specimen, which 

 occurred on the surface of a weed-grown pond in a wood near 

 Winlaton early in the spring of 1906. 



Genus ACHORUTES Tempi. 



Achorutes longispinus TuUb. 



A few examples have been found in a garden at Winlaton, 

 each occuring singly under stones embedded in the soft earth. 

 I have also found a variety of this species amongst decaying 

 herbage in Gibside and on decaying rhubarb leaves in a 

 garden near Winlaton, these latter specimens being peculiar 

 in the fact that, without exception, they were all without 

 mucrones to the spring. Dr. Randell Jackson has found A. 

 longispinus in large numbers on the surface of a pool of rain- 

 water at Chester, whilst in June, 1907, I took two or three 

 specimens from the surface of a tank of spring-water in a field 

 near Tarset, Northumberland. These are the first recorded 

 from England. 



Achorutes armatus (YWc.), A. viaticus {h.), A. purpurascens 

 Lubb., A. rufescens {^\c.\ and a species allied to A. schueideri 

 Schafif., have also occurred in the Northumberland and 

 Durham area. 



Genus XENYLLA Tullberg 



Xenylla humicola(0. Fabr.). 



Some time ago Miss Marie V. Lebour kindly sent me a 

 tube of this species gathered from the shore at Stranraer, and 

 I have since found it in large numbers at that place as well 

 as at Girvan, Ayr, Largs, in the Kyles of Bute, and on the 



