NATURAL HISTORY SOCIETY OF GLASGOW. 351 



will be found to remain throughout the year, if carefully looked 

 for. I do not say that the warblers which are reared in any one 

 locality remain there permanently; but if they really leave in 

 September, as they are said to do, their places are taken by others 

 whose flight has extended perhaps beyond Scotland altogether, 

 and whose return journey has been cut short by the temptations 

 of what we now know to be their winter diet. 



VII. — On SpiderSj with some additions to the Scottish lists. 

 By Mr Henry C. Young. 



Having recently captured several species of spiders which are 

 not noted in any published Scottish list, I have brought them 

 forward this evening in order that they may be recorded, as I 

 find it will be some time yet before the list which I am 

 preparing of the spiders of Clydesdale for publication by this 

 Society is ready. 



Argyroneta aqitatica, Clerck. This species, the well-known 

 " Water spider," has not, I believe, been previously recorded for 

 Scotland, although it was known to occur. Its peculiar habit of 

 constructing its habitation beneath the surface of the water makes 

 it conspicuous among all the members of the class, for although 

 there are several spiders which, when in pursuit of prey, have no 

 hesitation in descending beneath the surface, there are none 

 which habitually remain there. The specimen before us was 

 obtained from Possil Marsh, and I have not succeeded in finding 

 it in any other locality here. It occurs in England as far north 

 as Durham, and is found in nearly every country on the Continent 

 of Europe. 



Linyphia frenata^ Reuss- Wider. I have several examples of this 

 species from the neighbourhood of Glasgow. By Blackwall it 

 was considered rare in England ; and Dr Thorell notes it as rare 

 in Russia and Sweden. Menge, however, says it is common in 

 the vicinity of Danzig. 



Linyphia montana, Clerck. This spider is more common than 

 the preceding spider, and is generally distributed in Europe. 

 The specimens before us are from Dunoon and Rannoch. 



Linyphia nebulosa, Sundevall. I have obtained a number of speci- 

 mens of this species from a building in Glasgow. It is very rare in 

 England ; and is not a common species on the Continent ; having 

 been met with sparingly in Germany. I have examined 30 or 40 



