Phytobius.] RHYNCHOPHORA. BY if 
the latter character will also distinguish it from A. Waltoni and A. quad- 
rituberculatus, from the former of which it may at once be further 
separated by the evident channel on the thorax, and from the latter by 
not having the forehead excavate between eyes and the elytra not 
roughened behind at sides ; the colour is black with the underside and 
sides of thorax thickly elothed with white seales and the elytra variegated 
with patches of the same ; the scape of the antenna, and the tibia, are 
ferruginous or yellowish, the latter being sometimes fuscous in middle. 
L. 2 mm. 
Male with the intermediate tibia armed with a small hook and the 
last segment of the abdomen transversely impressed at apex. 
Marshy places; on aquatic plants; local, but not uncommon in some districts ; 
Woking, Caterham, Esher, Walton-on-Thames, Loughton, Chatham, Sheerness; 
Windsor Forest ; Portsmouth district; New Forest; not as yet recorded from the 
Midland counties ; Heysham, near Lancaster; Northumberland and Durham district, 
Prestwick Carr and Gosforth ; Scotland, scarce, Solway and Moray districts. 
P. quadricornis, Gyll. Black, not very dull, with the under 
surface, sides of thorax, and a spot at base of suture thickly clothed 
with white scales, the remainder of the upper surface with very scanty 
and often scarcely apparent scales ; legs ferruginous with the apex of 
femora, and the tarsi, fuscous ; rostrum very short and thick, base of 
antenne red ; thorax transverse, gradually narrowed but not or scarcely 
constricted in front, closely and rather strongly punctured, without 
central furrow and with four tubercles, two, widely separated, at apical 
margin, and two before base; elytra with deep and rather broad 
punctured striz, interstices finely rugose, somewhat asperate at sides, 
tarsal claws bifid. L. 2-22 mm. 
Male with the intermediate tibie armed with a hook and the fifth 
ventral segment of the abdomen transversely impressed at apex. 
Marshy places; on aquatic plants, especially Polygonum lapathifolium; rare; 
London district (Stephens) ; Sheerness (J. J. Walker) ; formerly in Battersea Fields, 
also in marshes near Broxbourne (S. Stevens); Ireland, near Dublin (McNab) ; 
I believe that it was also taken by Mr. Sidebotham but I do not know the locality. 
P. quadrinodosus, Gyll. Short oval, convex, black, with the 
underside and a patch at suture (sometimes obscure) thickly clothed 
with greyish scales, which are also somewhat thick towards apex and are 
very scantily scattered over the rest of the upper surface in fresh 
specimens ; antennz and legs ferruginous; thorax deeply and closely 
punctured, narrowed and somewhat constricted in front, with four 
tubercles, two at anterior margin, the interval between which forms a 
small incised angle, and two behind middle, disc channelled ; elytra 
rather broad, with deep and rather broad strixw, interstices at sides with 
a few rather large tubercles.» L. 2 mm. 
Male with the posterior tibia armed with a hook, abdomen with 
segments 2—5 rather strongly impressed, the impression being longitu- 
dinal and bounded with white pubescence on each side. 
