185 



APTERYGOTA FROM YORKSHIRE AND 

 DERBYSHIRE. 



JAMES MEIKLE BROWN, B.Sc, F.L.S., F.C.S. 



Sheffield. 



Since the pioneer work carried out by Lubbock (1862-70), 

 culminating in the pubhcation of his ' Monograph ' by the 

 Ray Society in 1873, the groups of insects included under the 

 term ' Apterygota ' have been rather neglected in this country, 

 A considerable amount of systematic work has been done by 

 continental naturalists such as Tullberg, Renter, Schott, 

 Schaffer, Borner, Linnaniemi and others, but until Prof. 

 Carpenter of Dublin took up the group, few important papers 

 dealing with the distribution of Collembola and Thysanura in 

 the British Isles appear to have been published. A number of 

 writers of late years, however, have partially made up for 

 this deficiency. Carpenter has published records for Ireland, 

 Carpenter and Evans for parts of Scotland, Collinge and 

 Shoebotham for the Midlands., Bagnall for the North of England 

 and Carr for Nottinghamshire. In these papers, except for 

 two casual notices (referred to below), I find no records of York- 

 shire or Derbyshire species, and hence the list given in this 

 paper, including though it does, many common species, may 

 be of interest. 



Most of the species enumerated here were collected last 

 year during (i) a short visit to Wharf edale and Wensleydale in 

 late July, (2) a longer stay in the Bakewell district during 

 August, and (3) at various times in the more immediate 

 neighbourhood of Sheffield. 



The nomenclature used is in most cases that of Linnaniemi 

 (Axelson) in ' Die Apterygotenfauna Finlands,' igi2. 



Order: COLLEMBOLA. 

 Family : Podurid.^. 



Podura aquatica L. Common on stagnant cattle ponds, etc. Hackfall 

 Wood, Beauchief, Over Haddon.* 



Achorutes armatus (Nic). Common under bark and fallen branches. 

 Ecclesall Woods, Haddon Meadows,* Dore*, Holmesfield,* Cord- 

 well,* 

 var. ineymis Axels. Ecclesall Woods. 



A. longispinus Tullh. Under bark. Ryecroft Glen.* 



A. purpurescens Lubb. Bakewell.* 



Xenylla grisea Axels. Under bark of fallen trees. Ecclesall Woods. 



X. humicola (O. Fabr.) Tullb. Reported by Bagnall from Saltburn.f 



X. maritima Tullb. Ryecroft Glen*, Grindleford,* Bakewell.* 



Pseiidachoriites subcvassus Tullb. Cordwell.* 



Onychiurus armatus (Tullb). Very plentiful under fallen branches, etc. 

 Beauchief, Ecclesall Woods, Bolton Woods, Hassop,* Haddon,* 

 Monsal Dale,* Dore,* Cordwell.* 



O.fimetarius (L. Lubb.). Under stones. Bolton Woods. 



* Localities starred * are in Derbyshire, the remainder are in Yorkshire. 

 t In Trans. Nat. Hist. Soc. of Northumberland, etc., 1910. 



1918 June 1. 



