20 



C. glabratus. — Black, without a violet margin ; the elytra almost smooth. 

 A mountain species, not rare in Scotland. 



C. nemojralis." — Head and thorax black, the latter with violet margins ; 

 elytra bronze or greenish, with three rows of depressions* Common. 



C. convexus. — Head and thorax black, the latter with bluish margins ; 

 elytra black, with three rows of somewhat indistinct impressions. A small 

 species. Rare. 



The individuals of this genus vary considerably in size, nitens, convexus, 

 and arvensis being about § inch, whilst intricatus, violaceus, catenulatus, and 

 monilis are among the largest, measuring from 10 to 14 lines (12 lines= 

 1 inch.) The males of this genus have the first four joints of the anterior 

 tarsi widely dilated ; in the female these joints are not broader than those of 

 the other feet ; the females . are also usually more rounded at the sides, and 

 also larger than the males. 



NEBRIA, 



1. Size, over half-an-inch. 



Elytra yellow, with dark markings - - complanata. 

 Elytra pitchy black, with pale yellow margins - - livida. 



2. Size, under half-an-inch - - brevicollis and Gyllenhalii. 

 Gyllenhalii differs from brevicollis in being narrower, with the legs and 



antennse generally darker; and the elytra, which in the latter are crenate 

 striate, in Gyllenhalii are very finely punctured, sometimes tmpunctate. 



Complanata is very local, but abundant where it does occur, viz., on shores 

 of the West of England and Wales, as Swansea, &c. Livida occur abun- 

 dantly in crevices of the clay cliffs at Scarborough ; brevicollis is one of the 

 most abundant beetles everywhere ; while Gyllenhallii occurs only on the 

 Welsh and Scotch mountains, at a considerable elevation, on Snowdon occur- 

 ing from 2,000 feet up to the summit. 



PELOPHILA. 



P. borealis is the only British species, and is very scarce, the localities 

 given by Mr. Dawson (" Geod. Brit." p. 49), being Loch Neagh and Kil- 

 larney in Ireland, and the Orkney Islands and West of Scotland. 



LEISTUS. 



(a.) Colour bright blue - spinibarbis and montanus, the former of which 

 has the thorax blue with the very extreme margin often reddish ; 

 the latter has the thorax much narrower behind and the sides of 

 the thorax distinctly red. 



(b.) Colour blue-black - - falvibarbis. 



(c.J Colour reddish yellow - ferrugineus and rufescens. Ferrugineus 



