Ceuthorrhynchus. | RHYNCHOPHORA. 353 
with moderate central furrow and small lateral tubercles ; elytra with 
comparatively fine punctured strize, and rather broad flat interstices, 
apex muricate ; legs rather stout, femora toothed, L. 2-25 mm. 
Male with the posterior tibize furnished with rather a strong hook at 
apex. 
On Sisymbrium officinale and (very rarely) on Erysimum alliaria ; also on Bras- 
sica; the larva has been found at the roots of Brassica napus; very local and, as 
a rule, rare, but sometimes found in abundance in a particular spot; Erith; Belve- 
dere, Kent, taken by Dr. Power and Mr, Champion in plenty ; Saltwood, Kent ; 
Bearsted (Gorham, one specimen) ; Sheerness; Folkestone: Hythe; Portsmouth 
district (Moncreaff) ; Llangollen (Chappell). 
This species might at first sight be easily passed over in mistake for 
the common C. plewrostigma, but the reddish-testaceous tarsi will at once 
distinguish it ; from C.alliarie, which has the tarsi pitehy red, it may be 
separated by the upright pubescence of elytra. 
C. pleurostigma, Marsh. (swleicollis, Gyll. mee Payk.). Oblong 
ovate, black, upper side with scanty greyish recumbent pubescence, 
underside thickly clothed with whitish scales, which are especially thick 
on the mesothoracic epimera ; thorax strongly constricted before apex, 
coarsely and not very closely punctured as compared with other species, 
with a strong central channel and a small lateral tubercle on each side ; 
elytra with deep but comparatively fine striz, interstices broad arid flat, 
rugose, muricate at apex; legs entirely black, femora not strongly 
toothed. L. 2-23 mm. 
Male with the posterior tibia armed with a hook, the last segment 
of the abdomen deeply and widely impressed, and the penultimate 
furnished with two small tubercles before apex. 
On various Crucifere; common and generally distributed throughout ‘the 
kingdom. 
Cc. alliariw, Bris. (inornatus, Wat.). Closely allied to the pre- 
ceding, from which it may be known by the pitchy red colour of the 
tarsi and the fact that the under surface of the body is sparingly fur- 
nished with white scales, the mesothoracic epimera being comparatively 
denuded ; in the male the penultimate ventral segment of the abdomen 
is simple and the depression on the last segment is bounded by a 
conical tubercle. LL. 23-3 mm. 
On Erysimum alliaria ; local but not uncommon where it occurs; Highgate, Nor- 
wood, Hammersmith, Mickleham, Caterham, Putney, Box Hill, Ripley, Belvedere, 
St. Mary Cray, Boundstone, Bearsted ; Portsmouth district (Moncreaff) ; it appears to 
be confined to the London, South-Eastern and Southern districts. 
C. rape, Gyll (inaffectatus, W. C., nec. Schén.). Rather a large 
species which at first sight resembles C. assimilis and C. syrites, but 
may be known by the more robust legs, toothed femora and cleft tarsal 
claws; leaden black, upper surface rather closely, underside very closely 
clothed with greyish-white scales; thorax rather long, narrowed in front, 
VOL. Vv. Aa 
