64 



This species is sometimes confounded with fuscicornis, in the bi-lobed 

 section, from which it may be known by the short basal joint of its 

 hinder tarsi. 



London district, Cambridge and Norfolk Fens, Falkirk. 



CIRCULA.E1S, Gravenhorst, Urichson. 1 — li lin. Dull black, 

 flattened, the two basal joints of antennae and the palpi testaceous ; 

 the legs rufo-testaceous, with the knees darker. Head with a shallow 

 furrow on each side, the interstice wide, scarcely elevated, except a 

 little in the front. Thorax broader than long, the sides strongly 

 rounded, very closely and strongly punctured, the interstices rough. 

 Elytra considerably longer than the thorax, not so closely punctured, 

 with a slight elevation between the scutellum and shoulder. Abdomen 

 flattened, strongly margined and contracted to the apex, the transverse 

 grooves and the keels very distinct. 



Eltham, Mickleham, Norwood and Wimbledon. " Once (rather 

 plentifully) in a flood at Bungay, Suffolk " (Mr. Grarneys). 



NANUS, Stephens, III. Mand. V. 301, 59, 1832 (and Coll.) 

 declaratus, Erichson, Col. Mar. vol. 1, pt. 2, 183i). 



1\ lin. Black, depressed, very slightly shining ; the legs dark 

 pitchy-red, though sometimes a little lighter ; palpi black, with the 

 basal joint testaceous. Similar in shape and size to circularis, but 

 differing from that species in the following points (besides the colour of 

 legs, palpi, and antennae). The head has two deep furrows, with a 

 sharp, decided, shining, middle elevation. The thorax is flatter, broader, 

 more contracted behind, and with an indistiuct broad transverse de- 

 pression between the middle and the hinder margin. The elytra are 

 flatter, a little longer, and rather more even. The abdomen is not quite 

 so distinctly margined, and the transverse grooves and keels are not so 

 evident. 



Abundant all over the kiagdom. 



PUMiLio, Erichson. This species is avowedly included in Mr. Gr. 

 R. Crotch's " Catalogue of British Coleoptera " on the authority of the 

 " Entomologist's Annual " for 1855, p. 125, 86, where a reference is 

 given to " A. R. Hogan, Zool., p. 4340 (1854)." I find that the Eev. 

 Mr. Hogan records it (loc. cit.) simply as " Stenus pumilio, Er.; 

 common," in a list of Coleoptera captured near Dublin. Dr. E. 

 Perceval Wright has kindly examined for me (with Erichson) the eight 

 or nine specimens representing this species in the Eoyal Dubliu 

 Society's Museum, from Mr. Hogan's collection, and finds that none of 



