208 CLAV'ICORNIA. \_Deridrophilus. 



visible if viewed sidcwaj's ; anterior tibiaj finely and irregularly denti- 

 culate. L. 2-3 mm. 



In tbe nests of i^orwjica rvfa; local; Esber, Forest Hill, Plnnisteatl, Hainpstead, 

 Coombe Wood, Haiuaiilt Forest; Norfolk ; Suffolk ; Bristol; Bewdley Forest; Buddoii 

 Wood, Leicester; Hopvvas Wood, Tamwortb ; Scotland, very local, Tay and Dee 

 districts. 



BX-STRMBTSS, Marseul. 



This genus contains one European species, wliicli for a long time was 

 associated with Saprinns ; it is, however, quite distinct from that genus 

 by reason of its narrow tibia?, of which the anterior pair are very finely 

 and indistinctly spinulose, and by the comparatively dull and impunc- 

 tate upper surface, and also by the fact that the anterior tibice are not 

 provided Avith grooves for the reception of the tarsi. 



IKE. piceus, Payk. Round, convex, pitchy-brown or ferruginous, 

 smooth, comparatively dull ; forehead without stria ; thorax short, some- 

 times lighter at sides ; elytra with fine striiB^ abbreviated behind, the 

 subhumeral stria alone being almost entire ; tibia? not dilated. L. 2-2|- 

 mm. 



lu nests of Formica rvfa ; local ; Plumstead ; Esber ; Parkburst Forest, Isle of 

 Wigbt; Norivicb ; Bristol ; Biiddou Wood ; Bewdley Forest ; Tamwortb ; York; Scar- 

 borougb ; Scotland, very local, Dee district. 



GNATHONCUS, Duval. 

 This genus contains about a dozen species from Egypt, North America, 

 Tasmania, <fcc. ; three of these are found in Europe, of which two occur 

 in Britain; there is, however, considerable confusion as to our species; 

 Mr. G. Lewis, who has lately done so much good work on the Histeridse, 

 and to whom I am indebted for other information regarding the 

 group, writes to me that he has never seen a British example of G. 

 rohmdatus ; all our specimens must therefore be referred to G. naime- 

 tcmsis ; the second species, G. pwnctulatus^ is by some authors considered 

 merely a variety, but it appears to be distinct ; the genus is very closely 

 allied to Saprinus, under which, indeed, it has been included by many 

 writers ; it differs in having the frontal stria wanting, and in the fact 

 that there is a considerable interval between the last two teeth of the 

 anterior tibia) ; the sutural stria is distinct in front and abbreviated 

 behind, and the epipleurte are furnished with three stria? instead of two 

 as in Saprinus. 



I. Size larger ; form more strongly convex and rounded ; 

 dorsal striaj of elytra reacbing beyond middle, tbe first 

 almost reacbing apex ; npper surface more strongly and 



tbickly punctured G. NANNEtensiS, Mars. 



II. Size smaller; form less convex and rounded, witb 

 more parallel sides ; dorsal stria; of elytra ceasing at 

 middle, witb tbe exception of tbe first wbieb almost 

 reacbes apex; upper surface more finely and diffusely 

 punctured G. ruNCTULATUS, Thorns. 



