When we had the pleasure of giving a figure of a nondescript 
Pcederus, we did not anticipate having it so soon in our power 
to lay before our readers this fine example of Rugilus , being 
a species at that time unknown in this country. 
In this curious genus, the trophi are very distinct from any 
that we have noticed, and from their power and perfection it 
may be inferred, that the individuals comprised in it are of 
very rapacious habits : the toothed labrum, the strong man- 
dibles (dentated like those of Cicindela) and the process imme- 
diately behind the labial palpi, indicating an approach to 
secondary maxillae, are amongst the most striking peculiarities. 
There are now four species of Rugilus in our British cabi- 
nets. 
1. R. fragilis Grav., Nob. 
2. orbiculatus Fab., Oliv., Panz. 43. 21. 
3. punctipennis Kirby’s Mss. 
4. immunis Kirby’s Mss.? 
Gravenhorst has described R. fragilis from a solitary ex- 
ample he had seen in the collection of Mons. Bose at Paris ; 
and the beautiful specimen figured (the only one known in 
Britain) was discovered last spring, under the bark of a pollard 
Willow at Walthamstow Ferry, by Abraham Cooper, Esq. 
The other species are common, and may be found in moist 
situations, in moss, under stones and amongst rejectamenta. 
The plant is Viola canina (Dog’s Violet). 
