

Ceuthorrhynclnis.} RHY\CHOPHORA. 353 



with moderate central furrow and small lateral tubercles ; elytra with 

 comparatively fine punctured striae, and rather broad flat interstices, 

 apex muricate ; legs rather stout, femora toothed. L. 2-2i? mm. 



Male with the posterior tibiae furnished with rather a strong hook at 

 apex. 



On Sisymbrium officinale and (very rarely) on Erysimum aUiaria ; also on Bras- 

 sica ; the larva has been found at the roots of Brassica naptu ; 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; 

 Beursted (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. pleurostigma, but the reddish- testaceous tarsi will at once 

 distinguish it ; from C. alliarire, which has the tarsi pitchy red, it may be 

 separated by the iipright pubescence of elytra. 



C. pleurostig-xna, Marsh, (tulcicollit, Gyll. nee 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 striae, interstices broad and flat, 

 rugose, muricate at apex ; legs entirely black, femora not strongly 

 toothed. L. 2-2 f mm. 



Male with the posterior tibiae arrned 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 Crnciferce ; common and generally distributed throughout the 

 kingdom. 



C. alliariae, 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. L. 2i-3 mm. 



On Erysimum aUiaria ; 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. rapee, Gyll (tna/ectafus, W. C., nee. Schon.). Rather a large 

 species which at first sight resembles C. asgimilis and C. pyrites, 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. v. A a 



