108 
BRITISH BEETLES. 
(Plate V., Fig. 1) being taken under stones and in 
moss in waterfalls, &c. 
The quadrate mentum, longer antennas, smaller 
eyes, and finer punctuation of this species, added to the 
long styles at the extremity of its abdomen, at once 
distinguish it from any of the Steni, to some of which 
it bears considerable resemblance. 
Stenus (in which the ligula with the paraglossae 
and labial palpi are so slightly articulated to the 
mentum, which is triangular, that, when suddenly 
killed, they are often thrust out adhering to the end 
of the gullet, and form a kind of proboscis) comprises 
a great number of species, of great family-likeness, 
owing to their cylindrical shape, strong punctuation, 
dull colour, and prominent eyes ; in the latter point 
affording another instance of the remark before made 
as to a similar development iu water-frequenting 
Coleoptera. They are divided into two sections, in 
which the fourth joint of the tarsi is respectively 
simple or bilobed ; and these are again formed into 
subdivisions, having the abdomen (seven segments of 
which are distinctly exposed) either with or without a 
lateral marginal ridge. Some of the species in both 
sections are also spotted on the elytra, and the males 
exhibit good distinctive characters in the notching, &c., 
of the terminal segments beneath ; — 8. providus, var. 
Roger?., having a strong row of curled yellow hairs 
turned inwards, on each side of the middle of the 
lower surface of the abdomen, besides certain notches 
and elevations at the apex. 
Those with bilobed tarsi are often found crawling 
slowly ou plants, whilst many of the other section 
run quickly iu dry places ; S. Guynemeri, found in 
