288 RHYNCHOPHORA, [ Bagous. 
B. petro, Herbst. (/imosus, Sharp’s Cat. nee Gyll.). Oblong, black, 
closely covered with grey scales which are somewhat uneven on the elytra ; 
antennz with the first joint of the club glabrous, shining, and as long 
as the following united, funiculus seven-jointed ; thorax very short, 
about half as broad again as long, enlarged in front behind the apical 
constriction and narrowed behind ; ashy grey with the apical border or 
one or two dark patches on border denuded and dark ; elytra dull 
black, convex, short and thick set, with coarse punctured strie, fifth 
interstice without callosity towards apex ; femora dark, tibiz ferruginous 
or red brown, tarsi pitchy. L. 12-23 mm. 
In brackish ditches; on aquatic plants; very local, and, asarule, rare; Gravesend 
and Sheerness (Champion) ; Notting Hill, on several occasions (Power); Hammer- 
smith Marshes (H. 8. Gorham); Harwich (J. J. Walker) ; Southsea, in moss near 
canal, not uncommon in spring (Moncreaff) ; Askham Bog, York ; Scarborough ; 
it is possible that one or two of these localities ought to be referred to B. sub- 
carinatus. 
B. cylindrus, Payk. Elongate, very narrow, linear, parallel and sub- 
cylindrical, black, thickly clothed with ashy scales ; rostrum comparatively 
long, evidently curved, glabrous in front, funiculus of antenne reddish ; 
thorax slightly variable, longer than, or about as long as broad, with 
the sides slightly rounded or almost parallel, very closely granulated ; 
elytra at base about as broad as base of thorax, compressed and some- 
what attenuate behind, very finely striated, without callosity before 
apex ; legs long, pitchy, with the tibiz ferruginous, tarsi nearly as long 
as the tibia, with the third joint equal in length to the preceding ; 
hook at apex of tibize long and distinct. L. 2}-3 mm. 
In ditches, on aquatic plants; rare, or, rather, extremely local; Notting Hill 
(one hundred and thirty specimens on October 24 and 31, 1863 (Power) ); 
Hammersmith Marshes (formerly common ina damp bank (S. Stevens) ); Gravesend 
(Power and S. Stevens) ; London district, on watercre:ses (Stephens) ; Lee ; Sheppy ; 
Whitstable (Champion) ; Pett Marshes, near Hastings, 1890 (Ford). 
B. binodulus, Herbst. This and the following are the two largest 
British species belonging to the genus, and may be recognized by their 
size apart from other differences ; oblong, black, closely covered with 
brownish-grey scales, antenne, tibize and tarsi more or less ferruginous ; 
forehead depressed; rostrum short and thick, moderately curved ; 
thorax about as long as broad, constricted at apex, sides subparallel, 
with an indistinet central furrow, sculpture very close; elytra sub- 
parallel until posterior third, from whence they are rather abruptly 
narrowed and depressed, with a strong prominent projection on the 
fifth interstice towards apex, a warty prominence on the third interstice 
behind middle, and a small shining callosity at the base of the first 
interstice, near scutellum. L. 43 mm. 
In ditches, &c.; by sweeping aquatic plants and with the water net; very rare; 
Battersea Fields (Stephens) ; Sandwich (Sharp and Saunders); Arundel (one speci- 
men, Hamlet Clark) ; Norwich and Crymlyn Bog, Swansea (Stephens) ; Fen districts 
