46 BEETLES. 



in this genus, and the last joint of the maxillary palpi is 

 tapering. The body is very slender. The species are numerous, 

 and have an elongated form. They live in damp woods under 

 moss, leaves, and stones. 



* L. elongatum, Linn. Shining black ; antenna?, legs, and 

 wing-cases orange, the last with the base black. The wing- 

 cases are longer than the pronotum. The head is nearly round. 

 Length, 8 mm. It is found in woods among moss. 



* L. falvipenne, Grav. Of the same size as the last species. 

 The pronotum is as long as the elytra, which are reddish-brown, 

 closely punctured. It is common in moss, flood-refuse, &c. 



Genus Pj]:derus, Grav. 

 Pronotum rounded, nearly oval; wing-cases truncated 

 behind ; body slender, with long slender legs ; antennae 

 straight and filiform. They live near brooks and streams, 

 generally gregariously under leaves and stones, but may also 

 be seen running about on the ground. 



* P. riparius, Linn. Wing-cases blue ; antennae black, with 

 the base orange. The pronotum, the first four segments of 

 the abdomen, the mesosternum, and legs are orange-coloured. 

 Length, 6-7 mm. A local insect, which likes to hibernate- 

 in rotten willows. 



P. ruficollis, Fabr. Blue-black, with a red pronotum, and 

 black antennae, palpi, and legs. Length, 8-9 mm. 



Genus Stenus, Latr. 

 Abdomen either completely round, or with the upper and 

 nether surfaces separated by a lateral border. The antennoe- 

 are situated between the eyes. The pronotum is narrower 

 than the head. These beetles live in damp places, such as 

 the banks of brooks, and in swamps, as well as under fallem 

 leaves in woods. There are a great many species. 



