I910. Browse.— A qua/ic Coleoptcra of West Donegal 183 



H. granulans, L. (^rt'wV^/Z/V, Thorns). -Dunfanaghy (1908). 



H. brevipalpis, Bedel.— Dunfauaghy and Cariickfiu (1908); uear L. 



Salt and Rosapenna L. (R. W., 1910). 

 Octhebius bicolon, Germ.— Uunfanaghy and Carrickfin (1908). 

 O. Lejolisii, Rey and Muls.—Dunfanaghy and Carrickfin (1908). 

 Hydrsena riparia, Kug.— Duufanaghy (1908). 

 H. gracilis, Germ.— Mulroy Bay (Dab. Mus. Coll., 1906). 

 CycIonotuiYi orbicularc, F.-Ardara (W. F. J.); Glenveagli (G. W. 



Chaster, ex. coll. J. Kidson Taylor) ; Dnufauaghy and Carrickfin 



(1908). 



In addition to the above list, there are a few records for 

 " Donegal," the most interesting of which is Dytiscits lapponi- 

 cus, recorded b}' Somerville. I have no doubt the species 

 still survives in some of the mountain tarns, and that several 

 other '"Arctic" species also occur. For instance, Hydroporus 

 morio, Dej., H. vielanarius, Sturm, and H. eelatiis, Clark, all 

 occur in the north of Ireland. I took one specimen of Agabus 

 congener, Payk., in the Mweelrea Mountains (Mayo W.) last 

 March, so that this species probably occurs in Donegal. Mr. 

 Stelfox brought me a specimen of Deronectes griseostriatus^ 

 and also one of Agabtcs arcticns, Payk, from near Parkmore 

 (Co. Antrim), in June, and I have since found the former 

 species fairh^ common in a peat}" loch on the Sallagh Braes 

 (Co. Antrim). These are not likely to be the only habitats 

 of these species in the north of Ireland, and A. arcticus has 

 already been recorded from the Wicklow Mountains, so that 

 I expect both species occur in Donegal. 



There must be a number of other species still to be dis- 

 covered in West Donegal, as the present total is not up to 

 the average for those neighbouring counties which have been 

 well worked. Donegal K-, which has also had but little 

 attention paid to it, has a list of 70 species. Down has 96, 

 Antrim 90, Derry 74, and Mayo W. has 83. 



Some west of Ireland species, such as Paracymus nigro- 

 ceneus, Schlb., and Helochares punctatus^ Sharp, which occur 

 again in the west of Scotland, are at present absent from the 

 list; and, further, the list as at present known might be 

 described as rather " colourless," being composed of species 

 very generally distributed, neither "Arctic" nor "Southern" 

 types being represented by species other than those which 

 are found in suitable habitats in various parts of the country* 

 e.g., Hydroporus tristis and H. Gylle7ihalii, Ilybiiis ce7iescc7is, &c., 

 and Octhebius Lejolisii, &c. 



