﻿Collemhola and Thy sanura from the Forth Area. 199 



j Spring-tails and some other neglected groups have recently 



j been engaging the attention of Mr E. S. Bagnall, Winlaton, 

 Co. Durham, with excellent results. In a series of interest- 

 ing notes, a printer's proof of which he has kindly shown 

 me, communicated to the Entomological Society of London, 

 he records iive species of Collembola not previously reported 



. from the British Isles. Among them are Isotoma qiiadrio- 

 culata, Tib., from Durham, and I. hidenticulata, Tib., from 

 Northumberland and the west of Scotland. The former I 

 have now the satisfaction of recording from Forth, and the 

 latter is pretty sure, I think, to occur in the upper portion 



i of the area. Indeed, there seems no reason why all the 

 species reported by Mr Bagnall, and several others as well, 

 should not occur with us at least locally. 



The following are the two additions above alluded to : 

 in their determination I have again had the kind help of 

 Professor Carpenter. 



Isotoma quadrioculata, Tullb. — Out of some growing 

 tufts of mosses and Sedum anglicum, got from the Isle of 

 May in April this year, I obtained, along with abundance 

 of Isotoma arhorea, L., a considerable number of a smaller 

 and greyer species, which proves to be the /. quadrioctdata 

 of Tullberg. As mentioned above, the species has only 

 recently been added to the British list by Mr Bagnall. 

 Abroad it is recorded from Sweden, Finland, Germany, 

 Bohemia, Novaya Zemlya, etc. 



Achorutes manubrialis, Tullb. — On 16th May this year, 

 when looking for beetles under rotting " Canada weed " on 

 the margin of Loch Leven (south side), I met with a few 

 examples of this form. The name stands in the first list 

 prepared by Carpenter and myself, but the subsequent 

 examination of numerous specimens of the true A. manu- 

 hrialis of Tullberg, from near Perth, showed us that the 

 Edinburgh specimens were a different insect — see our second 

 paper {Proceedings, Vol. XV.). It is a satisfaction, there- 

 fore, to be able to restore the name to our list. The species 

 has been found on lake- shores in Sweden and Finland. 

 Along with it at Loch Leven were innumerable examples 

 of a small purplish variety of Isotoma viridis. 



