B. femoratum. Length 2 lines. The spots whitish yellow. Antennae 

 with first two joints pale ; legs pale with dark femora. 



B. Bruxellense, Length 2J lines. The spots dark yellow. Legs yellow 

 with brown femora. Elytra strongly striate. 



B. littorale. Length 2| lines. Legs and first three joints of the antennee 

 yellow, thorax not so long as broad. 



B- fhwiatile. Length 2§ Knes. Legs and first three joints of the antennas 

 yellow. Thorax longer than broad, and much narrower behind than in lit- 

 torale, which it otherwise much resembles. 



B, concinnum. Length 2| lines. Distinguished by the antennae being 

 entirely yellow, and the fact that the basal spot is joined to the apical one by 

 the yellow outer margin of the elytra. 



The most abundant of these species, indeed the commonest of the whole 

 genus, is B. littorale, which occurs everywhere. B. fluviatile is scarce ; 

 B. tesiaceum, B. saxatile, and B. Bruxellense are more or less scarce ; 

 B. femoratum and the beautiful B. concinnum are tolerably common ; 

 B- anglicanum is very rare ; and B, lunatum is local, though common where 

 it does occur. Like most of the genus they frequent wet places, as the 

 banks of rivers, especially where these banks are flat and shingly. 



SCAKITIDES. 



There remain yet to be described the British insects included in the 

 Scaritides, which number about eleven species. These are divided into two 

 genera, viz., Dyschirius and Clivina, which are easily distinguished from each 

 other by the size of their respective species, for while none of the Dyscliirii 

 measure more than 2 lines the two Clivina are usually 3 lines in length. 

 Another useful point of distinction lies in the fact of the species of Clivina 

 having the front margin of the head perfectly plain, while in Dyschirius 

 this margin has a tooth at each end sometimes one in the middle in 

 addition. 



CLIVINA. 



1. Colour dark brown-black - fossor 



2. Colour reddish brown • - - - - collaris 

 Collaris is also usually rather smaller than fossor. The latter species is 



usually common while collaris is more local than its congener. 



DYSCHIRIUS. 



A. Length \\ to 2 lines, 

 a. Anterior tibiae with two distinct teeth on the outer side* 



