370 RHYNCHOPHORA. [Rhinoncus. 
B. Sides of thorax with a pointed tubercle; 
strie of elytra much less broad than inter- 
SHICES” sg, ee eee eee ee tor pe ads gil GRAMINEU Sati. 
(tnconspectus, auct. ) 
2. Form longer, narrower, and more oblong; size 
smaller ; elytra evidently longer than together 
broad’: sf tists Mme) sp Mstyiche- eowsrgs@ ey po PERPENDIOULARICZnenOne 
(subfasciatus, Gyll.) 
ii, Interstices of elytra, at least in part, furnished 
with distinct tubercles or asperities. 
1. Elytra with a very distinct white patch at 
scutellum” “: “oxte 6%, Pe) cay peiinyhapeyetinwy Rig OAS TOR 
2. Elytra without or with a very indistinct white 
atchyabtiscutelMUe ete een teres Cnn ee 
II. Anterior margin of thorax with two raised tubercles 
in middle placed near one another . . . . . . R.DENTICOLLIS, Gyll. 
R. BRUCHOIDES, Herist. 
R. pericarpius, L. (gramineus, F. (auct. nee vere) inconspectus 
Herbst. nec auct.). Short oval, broad, convex, black, underside thickly 
clothed with yellowish-white scales; upper surface with fine grey hairs, 
sides of elytra and a patch at base of suture covered with whitish scales ; 
antenne and legs pitchy-red or ferruginous; thorax transverse, deeply 
punctured, with the apical margin depressed, gradually constricted before 
apex, with very obsolete lateral tubercles ; elytra with strong punctured 
striae, interstices flat, finely granulated ; legs stout. L. 25-35 mm. 
Male with the posterior tibiz armed with a hook and the last ventral 
segment of abdomen with a small almost glabrous fovea at apex. 
On species of Polygonum, especially P. amphibium var. terrestre, also on Rumex 
obtusifolius and, according to Stephens, on thistles; common and generally distri- 
buted throughout the kingdom. ‘There is a small variety in Dr. Power’s collection 
taken by him at Balmuto, Fifeshire. 
R. gramineus, F. (inconspectus, auct. nec Herbst.). Of about the 
same size as the preceding, or, on an average, a little larger, with the 
under surface thickly clothed with ashy scales and the upper surface 
thickly chequered with greyish and yellowish-grey scales which are 
thicker on suture and form a patch towards base ; the species may easily 
be known from A. pericarpius by the duller and greyer appearance of 
the upper surface and especially by its longer thorax which has a dis- 
tinct tubercle on each side and the central channel evident, at all events 
behind ; the apical margin, also, is slightly elevated and produced; the 
antenne and legs are reddish or ferruginous, L. 3-4 mm, 
Marshy places ; on Polygonwm amphibium ; also in flood refuse, moss, &c.; very 
local and, as a rule, rare; Weybridge, Walton-on-Thames, Darenth, Merton, Egham, 
Forest Hill, Staines, Sunbury, West Wickham, Kingsbury ; Norfolk; Deal; Sand- 
gate, near Folkestone ; Amberley ; Faygate, Sussex ; Portsmouth district ; Exeter 
district ; Weston-super-Mare ; Tewkesbury ; Coleshill, near Birmingham; Wicken 
Fen; Lincoln (one specimen in flood refuse) ; Northumberland and Durham district, 
very rare, South Shields; Scotland, very rare, Solway district. 
R. perpendicularis, Reich. (suwbfasciatus, Gyll.; guttalis, Grav.). 
