58 transactions of the 



7th April, 1874, 



The first meeting of the summer session was held this evening — 

 Mr. Peter Cameron, jun., Vice-President, in the chair. 



SPECIMENS EXHIBITED. 



By Mr. David Pearson. — Living specimens of several species of 

 Helices, imported into this country amongst Esparto grass. 



By Mr. Alex. Watt. — Several mosses collected at the Society's 

 excursion to Corrie Glen. Amongst others, Orthotrichum rupestre, 

 Tortula ruralis, and Dicranum heteromallum. 



By Mr. F. G. Binnie. — Living specimens of Limax hrunneus 

 and other land molluscs, collected at the same excursion. He 

 also stated that he had found L. hrunneus last month at Bohroyston, 

 which, taken in connection with its occurrence near Possil Marsh, 

 would indicate tliat though local, it is generally distributed through- 

 out the Glasgow district, and that probably further research would 

 find it so throughout Clydesdale. It is probably only a persistent 

 variety of the abundant L. agrestis, characterised by its smaller 

 size, uniform brown colour, and limpid mucus, and difiering slightly 

 in habit, being seemingly restricted more to moist situations than 

 the type. 



By Mr. Peter Cameron, jun. — Two saw-flies not hitherto reported 

 as having been found in Britain : — Strongylogaster mixtus, Klug., 

 taken in the neighbourhood of Paisley ; Pcecilosoma ohtusa from 

 Bannoch. He remarked that it was doubtful if the Scottish 

 specimens of the latter insect were the same as the P. ohtusa of 

 Klug. which was found in Hungary, but they were undoubtedly 

 identical with those described under that name by Thomsom from 

 Sweden. It was quite possible that the species was a variable one. 

 Also Phyllotoma tenella, Zaddach, in its various stages of larva, 

 pupa, and imago. He said that the eggs were laid on the leaves of 

 the birch, and that the larva bores its way between the folds of the 

 epidermis, and by its continual feeding makes the leaf a mere 

 bladder, inside of which the larva can be easily observed by 

 holding the leaf between the observer and the light. The larvae 

 open the sides of the leaf to expel the frass. Two broods occur, 

 the first in the early summer, the second in the autumn. The 

 larvse of the second brood remain unchanged till the following 

 spring, passing the winter in a cocoon of very thin silk, which is 



