72 Second Bryological Excursion to Ben Lawers.  [Sess. 
too dry, animals shrivel; when too moist, mould becomes 
injurious. 
2. The habit of the insects is to work in the dark, and to 
obscure every transparency with clay. Calotermes does not 
do this, as it is only an excavator, and not a tube-builder. 
3. The limitation of area. Australian termites are ac- 
customed to work with unlimited material in unbounded 
space. 
4. The want of the stimulus of the queen’s presence. 
I shall try to introduce a queen, and watch the results. 
Ill.—A SECOND BRYOLOGICAL EXCURSION TO 
BEN LAWERS. 
By Mr A. MURRAY. 
(Read Dec. 27, 1899.) 
I SHOULD like to say a few words about a second excursion I 
had among the mosses of Ben Lawers last summer, as I know 
there are several members of the Society who are interested in 
these beautiful little gems of the plant world. About the 
middle of June last two fellow-members of the Society—Mr 
Harrison and Mr Russell—encamped with me near the top of 
Lochan-a-Chait. It was dark before we arrived there, so after 
a cup of tea we crawled under some large pieces of rock, and 
rested fairly well. I awoke about 2 aM, and lay for an hour 
listening to the monotonous “ yelp” of some young hawks on 
the crags above. Then I got up, had a cup of tea and a 
sandwich, and at once started on my botanical hunt among 
the rocks and crags on the north-west side of Lochan-a-Chait 
glen. I went a different way from that of last year, when we 
visited the same crags. Here I got some very fine specimens : 
many of them I had already gathered, but some I had not yet 
got. A few of those now found can only be gathered on 
Ben Lawers. 
About 6 am. Mr Harrison joined me, and directed my 
forews 
a 
