284 STAPHYLiNiDiE. [Adohius. 



large division on them, and, in fact, most authors do not even separate 

 the two species as a genus. 



I. Second joint of anteinise triangularly dilated, plainly 



thicker than the following. 



i. Head finely punctured at sides ; antennse dark 



with the first joint reddish testaceous A. clNEEASCETfS, Grav. 



ii. Head strongly and not thickly punctured at 

 sides ; antenuEB with apex and usually base tes- 

 taceous A. SIGNATICORNIS, Muls. 



II. Second joint of antennffi not triangularly dilated, 



not thicker than the following. 

 i. Antennse entirely testaceous, with the penultimate 



joints evidently transverse A. viLiosTTLtrs, Steph. 



ii. Antennffi dark, with base more or less testaceous, 



with penultimate joints hardly or feebly trans- 

 verse. 



1. Elytra pitch-black with apex only reddish ; 

 impressions at base of segments 2-4 of hind body 



scarcely punctured A. PEOCEBULrs, Orav. 



2. Elytra brick-red with base more or less broadly 

 darker ; impressions at base of segments 2-4 of 



hind body rather strongly punctured .... A. PBOLIXUS, Er. 



A. cinerascens, Grav. {Remits cinerascens, Thoms., 7iec Holme) 

 Elongate, sublinear, pitch-hlack, head and thorax shining, elytra and 

 hind body finely and thickly pubescent and dull ; head subquadrate, as 

 broad as thorax, finely and very thickly punctured, with a narrow 

 smooth longitudinal space in centre, antennae rather slender, with penul- 

 timate joints not transverse, and second joint dilated, dark, with the first 

 joint, and sometimes the apex, reddish testaceous ; thorax somewhat 

 longer than broad, rather strongly and closely punctured, with a smooth 

 central longitudinal space ; almost parallel-sided ; elytra and hind body 

 very finely and thickly punctured, the former evidently longer than 

 thorax ; legs ferruginous or reddish testaceous, anterior tarsi rather 

 strongly dilated in male, moderately in female. L. 4 mm. 



Male with the seventh ventral segment of hind body somewhat 



angularly sinuate in middle of apical margin. 



Marshy places, in flood refuse, moss, especially sphagnum, &c. ; rather common in 

 the south ; London district, generally distributed ; Hastings, New Forest, Devon- 

 shire, &c. ; Birmingham district ; Scotland, Lowlands, Solway, Forth, Tay, and 

 Moray districts ; the species must occur in the north of England, but is evidently less 

 common than in the south. 



A. sig-naticornis, Rey {rivularis, Kies.). This species resembles 

 the preceding, but may very easily be distinguished from it by the 

 following characters : the general appearance is more shining ; the head 

 and thorax are more strongly and less closely punctured ; the antennae 

 are dark with the apical joint yellow, or, in slightly immature specimens 

 the central portion only is dark, and the base and apex are yellow-tes- 

 taceous ; the scutellum and elytra are evidently less closely punctured 

 and much more shining, and the latter are somewhat shorter in pro- 



