154 



ANNALS OF SCOTTISH NATURAL HISTORY 



steepness of the sides in places made collecting difficult, 

 and except in the swampy Sphagnum areas I could only 

 collect by scraping the net along the edges where Sphagnum, 

 Scirpus, and other plants gave some possibility of shelter. 

 The Beetle fauna of the three lochans is the same, except 

 that I did not find D. lapponicus in the third and two 

 elements are clearly distinguishable in the following list, the 

 loch fauna and a fauna characteristic of pools on peat 

 mosses. The latter species came from the Sphagnum 

 swamps without exception. Newts abounded in all three 

 lochans. The fauna was as follows : 



Deronectes assimilis (i). 

 D. griseo-striatus (common). 

 Hydroporus tristis (common in 



swamp). 

 H. gyllenhalii (common in 



swamp). 

 H. erythrocephalus (loch and 



swamp). 



H. obscurus (swamp). 

 H. pubescens (swamp). 

 Agabus arcticus (very common, 



loch and swamp). 

 A. bipustulatus (common 



swamp). 

 Ilybius jenescens (i in swamp). 



in 



Rhantus bistriatus (a few in 



swamp). 

 Dytiscus punctulatus (i 6* and 



2 9 in two lochs). 

 D. lapponicus (i 6* and i $ in 



lochs). 



Acilius sulcatus (common in loch). 

 Gyrinus natator. 

 Philhydrus melanocephalus (in 



swamp). 



Anacaena globulus (in swamp). 

 Limnebius truncatellus (in 



swamp). 

 Helophorus viridicollis (in 



swamp). 



On the last day of my stay on Eigg I visited the 

 Lochan-na-Beinn Buidhe, a small shallow loch in the north 

 end of the island, 950 feet above sea-level. The bottom is 

 quite hard and covered with a fine gravelly silt, and all over 

 the loch Eleocharis, the club rush, was growing sparsely 

 with occasional patches of Juncus. On the west side a 

 low bank overhangs the water, while on the east side there 

 are a number of large loose stones in the shallow water. 

 I should imagine that nowhere does the loch exceed 3 feet 

 in depth, if it even reaches that. 



I first collected by wading in the water and working the 

 net under the overhanging bank on the west side, and by 

 this means I found all the species in the list. D. lapponicus 

 was represented by 5 or 6 specimens on that side, but when 

 I worked along the other side, gently lifting the loose stones, 



