64 



THE SCOTTISH NATURALIST 



List of species. 



Haliplus con/iniSy Steph. 

 ,, fuh'us, F, . 

 ,, ruficollis, DeG. 

 ,, we/itickeii Gerh. 



„ lineatocollis, Marsh. 

 Deronectes assimilis, Payk. 



„ l2-piistulatiis, O'. 



„ griseo-striaius, DeG. 

 Hydroponis trislis^ Payk. . 



gyllenhalii, Schiodte 

 niorio, Dej. 



palustris, L. . 

 iiicognitus, Sharp 

 eiythrocephalus, L. 

 celatus, Clark . 

 melanarius, Sturm . 



meiniioiiius, Nic. 

 obscui'us, Sturm. 

 nigrita, F. 

 discietus, Fairm. 



„ pubescens, Gyll 

 „ planus, F. 



,, litnratiis, F. 



,, obsoletus, Aube, 



Agabus gitttatus, Payk. 

 „ paludosus, F. . 



„ congener, Payk. 



„ nebiilosus, Forst. 



,, arcticuSy Payk. 



,, stiirmii, Gyll. 



,, chalconotus, Panz. 



„ bipustulatus, L. 

 Ilybius fuliginosus, F. 



„ itnescens, Thoms. . 

 Rhantus bistriatus, Bergstr. 



Colymbetes fiiscus, L. 



% 



2 

 2 



5 

 3 



i6 



5 

 3 

 8 



2 



39 



II 

 4 



17 

 3 

 I 



4 



36 

 17 



2 



73 

 I 



4 

 I 



2 

 2 



2 



i6 



9 



15 



65 



4 



29 



Confined to Loch Bar\'as area. 

 Only in two lochs in the south. 



Specimens distinctly smaller 

 than in more southern 

 localities. 



Only in running water. 



The rarity of this species is 

 remarkable. 



Recorded by C. W. Dale from 

 Tarbert, under the name 

 H , airiceps. 



One specimen only, taken in a 

 peaiy ditch by Mr G. B. 

 Hony. 



Only found on or in close 

 proximity to the Barvas sand- 

 dunes under similar conditions 

 to those in which the species 

 occurred in the island of Coll. 



Only in pools in the rocks above 

 high-water mark at Tarbert. 



Only in rock-pools, and once or 

 twice in small streams. 



On Ben Bragor, 700 ft., one 

 specimen. 



Common in two slow-flowing 

 swampy ditches at Barvas. 



Commoner in the mountains in 

 the south than in the north. 



Confined to Loch Barvas area. 



For some reason difficult to 

 understand, absent from the 

 Tarbert district. 



Abundant in some of the lochs 

 in the north, where in some 

 cases it was the only species. 



About equally common in north 



and south. 

 Only once in the south. 



