Rhinoncus.| RHYNCHUPHORA. 371 
Much smaller than either of the two preceding species, oblong-oval, 
moderately convex, black, with the sides of the thorax and the under- 
side clothed with white scales, which are also scattered more or less 
thickly over the upper surface and form a patch at scutellum; base of 
antenne, tibiz and tarsi, and sometimes femora, ferruginous or pitchy 
yellowish brown ; thorax subeylindrical, about as long as broad, with 
sides rounded in middle and narrowed in front and behind, deeply and 
coarsely punctured, without central channel or lateral tubercles ; elytra 
evidently longer than together broad, with deep punctured striae, inter- 
stices narrow, somewhat rugose; in quite fresh specimens there are 
distinct oblique bands of scales on the elytra and sometimes the suture 
behind middle is thickly clothed with white scales. L. 2-24 mm. 
In damp places ; on species of Polygonum ; somewhat local, but rather common 
and generally distributed from the Midlands southwards; rarer further north; it is 
recorded from the Northumberland and Durham district but has not hitherto been 
found in Scotland; Ireland, Galway, common (J. J. Walker) and Armagh. 
R. castor, F. (granulipennis, Gyll.). Short oval, moderately convex, 
black or pitchy black, underside thickly clothed with whitish scales, 
sides of thorax and central line with more or less distinct greyish or 
greyish-yellow scales, elytra with the interstices more or less thickly 
speckled with the same scales which are thicker and form a conspicuous 
oblong patch at the base of suture ; antenne reddish testaceous, with 
club darker, legs reddish testaceous with the extreme apex of tibiz and 
apex of tarsi dark ; thorax slightly transverse, obsoletely channelled, 
with a blunt tubercle on each side, strongly and closely punctured ; 
elytra much broader than thorax, with the shoulders well marked, and 
with punctured striw, interstices moderately broad, tuberculate. L. 
2-22 mm. 
In sandy places ; by sweeping herbage ; perhaps, according to M. Bedel, on Poly- 
gonum aviculare ; also found at roots of Rumex acetosella and in moss; by no means 
uncommon, but somewhat local in its distribution; London district, Kent, Surrey, 
and the South-Eastern counties, generally distributed and common ; also widely dis- 
tributed along the South coast; Devon, rare; Bristol; Swansea; Barmouth; 
Norfolk ; Suffolk ; Midland districts, very local, Repton, Matlock, &c.; Scarborough ; 
Liverpool; Manchester district, general; Northumberland and Durham district, 
rare, Gibside, near Gilsland, and Hetton Hall, near Belford; Scotland, common, 
Solway, Tweed, Clyde, Forth, Tay, Moray and probably other districts; Ireland, 
Dublin and Belfast, and probably general. 
R. bruchoides, Herbst. (asperatus, Gyll.). Rather smaller, on an 
average, than the preceding, which it resembles in having the interstices 
of the elytra tuberculate or asperate ; 1t may however be easily known 
by its darker, more pitchy, colour and by having no distinct greyish 
patch at the base of suture; short, convex, thickly clothed with whitish 
scales beneath, upper surface with scanty cinereous scales which, in 
quite fresh specimens, sometimes form three whitish lines on thorax ; 
antenne and legs ferruginous; thorax broader than long, not strongly 
Bb 2 
