t^i^- Browne. — Aquatic Coleoptera of S.E. Irela7id. 7 



when I found a single specimen at Youghal, East Cork, and 

 it did not occur commonly in my experience until some time 

 after that. Whether this was due to the fact that it is chiefly 

 a spring insect inhabiting what Edwards very aptly terms 

 " vernal swamps," or whether it is due to a sudden increase 

 and expanded distribution, I will not venture to say. It 

 is possible that increased opportunities of spring collecting 

 may account for the case and the same remarks will apply 

 to Helophorus granulans which I now find fairly often and 

 usually abundant, but which I did not know prior to 1908 ^ 



The following list includes all the records for the six 

 south-eastern counties which I have been able to find. A 

 large cross indicates that I have taken the species myself, 

 and a small cross indicates that the species has been re- 

 corded. At the end of the paper I have added a 

 bibliography of all papers known to me which refer to water- 

 beetles of this south-eastern district. 



* Almost all the Haliplus which were not lineatocollis were typical 

 ruficollis S 9 . No male Wehnckei were found but two or three female 

 specimens, with the elytral interstrial spaces impunctate at the base, 

 were taken. I have doubts as to the entire reliability of this char- 

 acter for distinguishing females of Wehnckei from those of ruficollis, 

 but I shall go into this question on another occasion. 



^ The Aquatic Coleoptera of West Donegal. Irish Nat., Sept., 1910. 



