Insects from Rosscarbery, County Cork, 3(55 



Psithyrus barbutellus, Kirb. f These I believe are the first 



j Irish records, but the former 

 Botnltius schrimshiranus, Kirb. I was previously taken, though 



not recorded, by Mr. Freke, at 

 Dundrum, Co. Dublin, and the 

 ) latter at Carrickmines, in the 

 \ same county. I have a speci- 

 men oiB. barlmtellus from Port- 

 marnock, taken last June. 

 Both species were common, 

 with others of the same genera 

 (^on heath at Castlefreke. 



The Andrcncs in the above list are fev/, as might be expected 

 in the case of a spring-flying genus. The Fossores are also 

 poorly represented although the locality seems specially 

 suitable for them. The absence of social Wasps was remark- 

 able, while the social Bees were unusually abundant. 



IRISH KNOTWBEDS 



BY REV. C. H. WADDKIvI., B.D. 



ThK following notes upon some species of the genus Polygonum 



may be useful, as the Irish Knotweeds do not seem to have 



received any special attention from Irish botanists. Mr. A. 



Bennett of Croydon has kindly named the critical species and 



varieties for me which are mentioned in this paper. 



Polygonum Convolvulus, Linn., var. subalatum, V. Hall— 

 Saintfield, Co. Down, growing as a garden weed, 1893. Crossgar, 

 Magheralin, Co. Down. — This variety has long been known in England, 

 where it was named pseiido-diwidorum by Mr. H. C. Watson, because it 

 was so often mistaken for P. dtimctorum, but does not seem to have 

 been recorded for Ireland. It is interesting as being an intermediate 

 variety between that species and P. Convolvulus, the common Black Bind- 

 weed of cornfields, from which it may be easily distinguished by the 

 winged segments of the perianths. I have found it at the localities 

 mentioned, but cannot meet with the type, and my friend Mr. S. A. 

 Stewart tells me he has also found the variety this season at Donaghadee. 

 Is the typical plant common in other districts in Ireland } When 

 growing as a weed in rich soil the variety is a very beautiful plant, and 

 climbs several feet high. 



A 3 



