RHYXCHOPHORA. 



361 



shoulders not marked ; (species extremely 

 closely resembling Ceuthorrhynchus punc- 



tiger) C. DISTIHCTUS, Bris. 



B. Club of antenna? fusiform ; thorax some- 

 what depressed, short ; elytra rather de- 

 pressed, quadrangular, with the shoulders 

 well marked. 



a. Elytra with a distinct white patch at scn- 

 tellnm ; thorax with a feeble tubercle at 



each side C. QCERCICOLA, Payk. 



(versicolor, Bris.) 

 (F. Crotchi, Bris.) 



b. Elytra without or with an indistinct light 

 patch at scutellum ; thorax without tuber- 

 cles at sides C. MIXTUS, Mul*. 



(nigroterminatus, Woll.) 



2. Upper surface reddish-brown; thorax with 

 three more or less distinct longitudinal grey 

 lines. 



A. Rostrum unicolorons, pitchy or dark fer- 



ruginous. " 



a. Forehead without a white patch between 



eyes C. TROGLODYTES, F. 



b. Forehead with a white patch between 



eyes. 

 a*. Size larger ; thorax longer ; scntellnm 



with a white patch on each side . . . C. CHETBOLATI, Bris. 



(minimus, Walton ?) 

 b*. Size smaller ; thorax shorter; scntellum 



without a white patch on each side . . C. EUFTJLUS, Diif&ur. 



(Jrontalis, Bris.) 



B. Rostrum clear red with the apex black; 



size very small C. DAWSOUI, Bris. 



C. floral is, Payk. Short oval, moderately convex, black, with 

 cinereous pubescence, upper side clothed with greyish scales, which are 

 lighter at suture, underside thickly clothed with whitish scales ; rostrum 

 long and slender; thorax a little broader than long, rather strongly con- 

 stricted before apex, with an interrupted central furrow and a small 

 tubercle on each side, closely, punctured, base bisinuate, anterior margin 

 raised ; elytra with deep punctured striae, interstices somewhat convex, 

 scarcely muricate at apex. L. lj-2 mm. 



Male with the posterior tibiae armed with a hook and the last segment 

 with a broad fovea, more deeply impressed at apex ; antennae inserted 

 in middle of rostrum. 



Female with the tibiae simple and the last segment with an obsolete 

 fovea ; antennae inserted a little behind the middle of rostrum. 



On various species of Cruciferee (Capsella, Erysimum, &c.); common and gene- 

 rally distributed throughout England aud Scotland, and probably Ireland. 



C. hepaticus, Gyll. Closely allied to the preceding, but on the 

 average larger, and more convex, with no sutural lighter streak, shorter 

 limbs and lighter coloured tarsi ; the elytra are furnished with a row of 

 white hairs inserted in the striae ; according to Schonherr the tibiae 



