Bayous.] 



RHYNCHOPnOUA. 



287 



B. 



Boh. 



B. BREVIS, Schonh. 



variegated with light and 

 dark grey ; elytra depressed 

 with the alternate interstices 



raised B. LTJTULOSUS, Gyll. 



ff. 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 . . 

 JJ. Form comparatively nar- 

 row ; elytra scarcely con- 

 vex ; dorsal channel of tho- 

 rax very distinct .... 

 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. LUTOSUS, 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 



black B. GIABRIROSTRIS, Herbst. 



(lutulentvs, (Jyll.) 

 (V. nigritarsis, Thorns.) 



B. alismatis, Marsh. Oblong, clothed with ashy-white or greyish 

 yellow scales, 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 ; antennae 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 patches at base ; on 

 each side there is a plain transverse impression ; elytra rather long, 

 somewhat abruptly narrowed before apex, with fine and distinct punc- 

 tured striae and flat interstices ; legs long, dark, tibiae 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, &c. ; on Alisma plantago (Water Plai.taiu) ; rather local, but not 

 uncommon and very widely distributed ; Netting Hill, Norwood, Ramsgate, Lee, 

 Wimbledon, Battersen, Forest Hill, Barnes, Eainham ; Birdbrook, Essex; Deal; 

 Dover ; Hastings ; Ai uudel ; Sandown ; Portsmouth district ; Devon ; Bath ; Swan- 

 sea ; Bewdley ; Hepton ; Lincoln ; Norfolk ; Liverpool district ; Manchester district 

 (general) ; Northumberland and Durham district ; Scotland, local, Solway, Tweed, 

 Forth and Clyde districts; Ireland near Dublin. 



