1882.] 9 



Glass, which has its source near Ben Attow, close to the west 

 coast of Scotland, flows through it in a somewhat deep channel, 

 and discharges itself in the Beauly firth. About seventeen miles from 

 Beauly the Cannich joins the Glass ; this place, where there is a small 

 village containing a good hotel, I made my head quarters. Invercan- 

 nich is, in fact, the centre of the district, all the churches are situated 

 near here, and on Sundays it is quite a busy place, the people having 

 to come in some cases upwards of twenty miles to get to church or 

 obtain a glass of the national beverage. 



This is one of the best localities I have ever visited ior Neur opt era, 

 more particularly Trichoptera, as water is plentiful in many conditions. 

 A swift deep river (the Glass) traverses the Strath ; then we have 

 the Cannich, passing over many falls in its course before it reaches 

 the Glass, which makes it very suitable for certain species of caddis- 

 flies ; burns of all sizes abound, while Lochs and " lochans " are too 

 numerous to mention, these latter occurring at all heights on the 

 surrounding hills, and as for ditches and marshy ground, the difiiculty 

 is to keep clear of them. 



During the two months I staid in the district, little or no rain 

 fell, but during the night a heavy fall of dew took place. In the day 

 time the heat of the sun's rays made it almost impossible to undertake 

 any long excursion, hence most of my collecting took place not far 

 from Invercannich. 



TRICHOPTEEA. 



Upwards of two-fifths of the British species of this group were taken. 



Fhryganea striata, L., a few odd specimens occurred in various localities. P. 

 ohsoleta, Hag., was the common species of the district, at no Loch or Loclian was it 

 absent ; I have had as many as a dozen in my net at one time while sweeping. In 

 Glen Cannich, at a small peat-hole dui'ing an exceedingly wai-m day, I observed a 

 very light coloured ? of this species thrice descend about eighteen inches into the 

 water, using a I'eed' to walk on, no doubt it was in the act of oviposition, it evidently 

 came to the surface of the water to get air, as in each case it merely came to the 

 water's level, turned round, and deliberately walked down again; each time, I should 

 think, it stopped down about one minute and a half ; the insect seemed strange to 

 me, and I could not resist the temptation to catch it when it made its appearance 

 on the surface the third time. 



Qlyphotcelius pellue.idus, Oliv., occurred at many of the Lochs, but was not 

 common. 



The genus Limnophilus was well represented, fifteen out of the twenty-four 

 British species being captured. 



Limnophilus rhomhicus, L., common. L. horealis, Zett., three specimens turned 

 up at different Lochs. L. marmoratus, Curt., common everywhere. X. stigma, 

 Curt., rare. L. lunatus, Curt., abundant at all levels. L. ignavus, Hag., one speci- 



