Bagous. | RHYNCHOPHORA. 287 
variegated with light and 
dark grey; elytra aepressed 
with the alternate interstices 
raised . B. LUTULOSUs, Gyll. 
++. Surface of "body not dis- 
tinctly variegated ; alternate 
interstices of elytra at most 
somewhat convex. 
+. Form broad and robust; 
elytra convex ; dorsal chan- 
nel of thorax obsolete . . B. DIGLyptus, Boh. 
++. Form comparatively nar- 
row; elytra scarcely con- 
vex ; dorsal channel of tho- 
rax very distinct . . B. BREVIS, Schinh. 
2. Third joint of tarsi broader than the second, 
and evidently, although not strongly, bi- 
lobed. 
A. Body behind thorax narrowed into rather 
an elongate point at apex; sculpture of 
elytra finer, third interstice with an ill- 
defined yellowish patch behind; tarsi red . B. Lurosus, Gyll. 
B. Body behind thorax not strongly narrowed 
and scarcely inflexed at apex ; sculpture of 
elytra coarser, third interstice with a dis- 
tinct white patch behind; tarsi red or 
bine el TNE OS,. . . . . . . *B. G@LABRIROSTRIS, Herbst. 
(lutulentus, Gyll.) 
(V. nigritarsis, Thoms.) 
B. alismatis, Marsh. Oblong, clothed with ashy-white or greyish 
yellow seales, which are more even on the under surface ; elytra some- 
what variegated, with a lighter spot on each behind middle and a 
somewhat denuded dark patch above and below each of them ; rostrum 
moderately long, almost straight, thickly scaled, glabrous at apex, with 
a plain central furrow; antenne ferruginous with the club darker; 
thorax about as long as broad with the sides subparallel, very slightly 
rounded, finely granulate, with a fine and distinct central furrow, and 
lighter spots and often one or two small denuded patclies at base ; on 
each side there is a plain transverse impression; elytra rather long, 
somewhat abruptly narrowed before apex, with fine and distinct pune- 
tured striz# and flat interstices ; legs long, dark, tibize curved and of a 
red colour; in the male of this and most of the other species the 
abdomen is impressed at base, whereas in the female it is convex. 
L. 3-3$ mm. 
In ditches, &.; on Alisma plantago (Water Plantain) ; rather local, but not 
uncommon and very widely distributed; Notting Hill, Norwood, Ramsgate, Lee, 
Wimbledon, Battersea, Forest Hill, Barnes, Rainham; Birdbrook, Essex; Deal ; 
Dover; Hastings; Arundel; Sandown; Portsmouth district; Devon; Bath; Swan- 
sea ; Bewdley; Repton; Lincoln ; Norfolk ; Liverpool district ; Manchester district 
(general) ; Northumberland and Durham district ; Scotland, local, Solway, Tweed, 
Forth and Clyde districts ; Ireland near Dublin. 
