THE AQUATIC COLEOPTERA OF THE MID-EBUDES 83 



In the above list, with the possible exception of Cn. 

 impressus and D. circumflexus, the species are true halophils, 

 being found chiefly in brackish pools, and although some of 

 the records may be erroneous, it is, at least, improbable that 

 all the inland records in the list can be accounted for on 

 that ground. Within the maritime counties, also, there are 

 inland records for many of the species, and they are, I think, 

 all to be accounted for by the natural tendency of species 

 to extend their range. That there are limits to their powers 

 of adaptation is evidenced by the fact that most of the inland 

 records are for single individuals, and that there is seldom 

 more than one record for a county or vice-county. 



There are also a number of other " ectopic " records 

 such as, Coelanibus versicolor, Schall, in Ireland and Scotland ; 



C. parallelogrammus, Ahr., and Hydroporus flavipes, Ol. 1 in Co. 

 Down ; Hydroporus dorsalis, F., and Copelatus agilis, F., in 

 Dumfries, and so on, and at least some of these probably 

 indicate migratory movements of the species which, from 

 the fact that there are no later records, have failed. 



The following list includes all the species so far recorded 

 for the Mid-Ebudes :- 



Haliplus confinis, Steph, Coll, several in a slow-flowing weedy burn 



at the south end. 



H. fulvus, F. Coll and Mull, on several occasions. 

 H. ruficollis, De G. Coll, not common. 



H. lineatocollis, Marsh. Coll and Mull, rather more frequent than 



the last. 



Ccelambus incequalis, F. Coll, about as common as H. lineatocollis. 

 Deronectes assimilis, Payk. Coll, in some of the small lochs. 



D. depressus, F. Mull, Tobermory river. 



D. 1 2-pustulatus, OL Coll, one stream only ; Mull, Tobermory 



river. 

 D. griseo-striatus, De G. Mull, in the Power Collection, British 



Museum. 



Hydroporus lepidus, Ol. Coll, not common. 

 H. rivalis, Gyll. Mull, Tobermory river. 

 H. septentrionalis, Gyll. Mull, Tobermory river. 

 (H. halensis, F. Mull (Andrew Murray, Cat. 1853))? 



1 The specimen is in the Haliday Collection, Dublin Museum. 



