Ihjthinus.'] clavicorkia. 89 



America ami Australia, so that it is evidently widely distrilnited ; tlio 

 shape of the maxillary palpi, ^vhich are large ami eonspicuous, differs very 

 much in individual members of the genus, and the characters presented 

 by the second joint of the antenntB in the male are very important. 

 The genus may be divided into two sub-genera as follows : — ■ 



I. Antennae with the first joint very long; basal 



joint of ])alpi, at least in the female, uneven ; 

 eyes of feniiile very small or wanting ; elytra 

 inipunctate Sub-gen. MacHjEKITES, Midler. 



II. Anteua; with the first joint moderate; basal 

 joint of palpi without trace of i)rominences or 



teeth ; elytra in all our species punctured . . Sub-gen. BrTniNTJs, i. sp. 



(Sub-Gen. Machserites, Miiller.) 



This sub-genus contains only one British species ; fifteen species are 

 enumerated in the last European catalogue, but one or two others have 

 been recently described by M. Fauvel ; they are found iu caves, and also 

 in ants' nests, under stones, &c. 



S. g-labratus. Rye. Testaceous-i-ed, very shining, thinly-clothed 



with long scattered yellowish hairs ; head lather narrow and elongate, 

 eyes black, very small; antennas rather slender, basal joint almost cylin- 

 drical, and almost as long as joints 3-8 together ; 2nd joint as long as 

 3 and 4 together, with no perceptible peculiarity of structure, 10th and 

 11th forming a club ; thorax cordate rather straightly narrowed behind, 

 with a large shallow fovea on each side below the middle, rcacliing the 

 lateral margin and connected across the base of thorax by an impressed 

 curved line ; elytra with the sides gradually widened and rounded from 

 the base to the outer posterior angle, impunctate, or at most with a few 

 obsolete traces of punctures ; abdomen smooth and shining, legs reddish- 

 testaceous, slender and elongate. L. lj-l-| nim. 



Three ppecimens of this very rare species were taken by Messrs. F. H. and E. A. 

 Waterhouse at the end of the funimer of 18(!5 in a mossy hollow on the chalk on 

 Seaford Downs, in company with Trichont/x MaerJcelii and a small yellow Myrmica 

 (y. Ent. Monthly Mag. vii., p. 33) ; I captured a single specimen under a stone iu 

 company with T. MaerJcelii at Sandown, Isle of Wight, on April 12th, 1884 Tbi re 

 are two specimens in Dr. Sharp's collection from Eccles, near Dumfries, which are 

 doubtfully referred to this species. 



(Sub-Gen. Bythinus, i. sp.) 



This sub-genus has usually been considered to contain five British 

 species, but a sixth, B. validus, must be added ; the characters of the 

 antennce and maxillary palpi will serve, as a rule, to distinguish them. 



I. Thorax distinctly punctured. 



i. Male with the femora simple and the first joint of the 

 antennce armed with a small dentiform appendage 

 at apex ; thorax narrower B. PUNCTICOLLIS, Benny, 



