Bnjaxis.'] CLAVICORNIA. 97 



with a larger spine ; in this sex also the anterior tibiae are acutely dentate 

 on their inner side before apex, and the intermediate pair are furnished 

 with a spur at apex. L. 1-1 1 mm. 



Iu moss, flood refuse, by sweeping, &c. ; generally distributed and common through- 

 out England ; recorded us common in the Northumberland district by Bold ; Scotland, 

 Lowlands, in sphagnum, very local, Tweed and Solway districts ; Ireland, near Dublin 

 aud Belfast. 



B. iinpressa, Panz. (Dierobia impressa, Thorns.). Black or pitch- 

 black, shining, with the elytra bright red, with suture and margins some- 

 times darker, palpi testaceous, antennae and legs pitchy, tibiae and tarsi 

 lighter than femora ; head and thorax impunctate or almost impunctate, 

 the latter with the central of the three basal foveee minute ; this character 

 will easily distinguish it from all our other species except B. juncorum, 

 from which it may at once be known by its colour ; elytra about as long 

 as together broad, hardly visibly punctured ; abdomen shorter than 

 elytra, margined, the segments becoming gradually narrower towards apex. 

 L. 1|-1|- mm. 



Male with the intermediate coxae spinose, trochanters simple, inter- 

 mediate tibiae with distinct spurs. 



In haystack refuse, moss, refuse on the banks of ponds, &c. ; local, but sometimes 

 abundant where it occurs; London district, not common, Lee, Woking, Eltham, 

 St rood, Tottenham, Uagenham ; New Forest; Shirley Warren, Southampton; The 

 Holt, Farnham ; Coleshill near Birmingham, in abundance ; Needwood Forest, near 

 Burton-on-Treut ; Ask ham Bog, York ; not recorded from the Northumberland and 

 Durham districts, and very doubtful as Scottish, the only record being " llaehills, 

 Kev. W. Little," Murray's catalogue. I also feel some little doubt as regards the 

 record from Askham Bog. 



EUPLECTINA. 



This tribe, which forms the second great division of our British 

 Psclaphidse, contains about fourteen or fifteen European genera of which 

 four are indigenoxxs ; one of these, Biblojjorus, has usually been classed 

 with Eupledus ; they differ from the Pselaphina in having the posterior 

 coxae conical, prominent, and contiguous, and in their more or less linear 

 form, but this latter character is not so marked in Tricltonyx as in our 

 other three genera ; the four British genera may be distinguished as 

 follows : 



I. Tarsi with two unequal claws TRICIIONYX, Chaud. 



II. Tarsi with a single claw. 



i. Abdomen with the first visible dorsal segment of 

 abdomen elongate ; last joint of antenna} very large; 



form more convex TRIMICM, Aul6. 



ii. Abdomen with the first visible dorsal segment not 

 longer than second ; last joint of antenna) moderate ; 

 form more depressed. 



1. Head distinctly narrower than thorax BIBLOPORUS, Thorns. 



2. Head not narrower than thorax EUPLECTUS, Leach. 



VOL. III. II 



