i8«8.; 59 
(^ . Shiniug, the interstices being very obsoletely punctured. 
? . Sub-opaque, the interstices being thickly punctured. 
Varies greatly in size, the males being generally smaller than the 
females. Local, but common, when found, in England Horaing and 
Deal. I have not found it in Scotland. 
9. G. opacus, Sahl. Ovate, not very convex, above bluish-black, 
shining, the sides brassy, the elytra rather finely punctate-striate, 
the internal strise being evidently finer, especially towards the 
base, than the outer ; under-side brassy-black, legs red, with the 
exception of the claws. Long. 2^—3'"; lat. li — l]"'. 
^ . Shining, the interstices being very obsoletely punctured 
? . Not so shining, the interstices being thickly punctured. 
Yar. The upper surface being altogether dull and opaque. 
This species is very closely allied to the preceding, and, like it, 
varies considerably in size ; it is, however, on the average considerably 
smaller, and the striaa of the elytra are finer, especially the inner ones ; 
some of the varieties, however, come very close to one another. Local, 
but common, in Scotland — Edinburgh, Glasgow, Inverness, Galloway. 
Also at Horning, in company with G. marinus ; I have not noticed it, 
however, from farther south. I think I am right in my determination 
of this species. Moreover Sufirian recorded it as British twenty-five 
years ago, though it has not yet made its appearance in our Catalogues. 
The dull variety is very curious, resembling G. minutus, in whose 
company it was found at Invercannich, Tnvernesshire. 
2. — Obectochilus, Lacordaire. 
The generic characters readily suffice to distinguish the single species, 
O. villosus, Fab. It is oblong, ovate, convex, the upper surface 
pubescent, and tolerably thickly and finely punctured, fuscous in 
colour, the elytra without any striae, the under surface and legs 
reddish-testaceous. Long. 3'". 
This species is local and of nocturnal habits. I have seen it 
gyrating by moonlight in Loch Ken, in Galloway. It surpasses any of 
the Gi/rini in agility, so that when disturbed, the eye fails to be able to 
follow its motions. In the day-time it remains concealed under stones 
and logs by the side of the water, but the instant it is disturbed it darts 
away, so that it is very difficult to secure. By Lifting, however, very 
gently the logs and stones where it occurs and dropping them instantly 
into a net, a good number may be procured. I captured in Galloway, 
last summer, between 30 and 40 specimens on the under-side of a single 
