CURCULIONID^.— MONONYCHUS. '43 



■ Sp. 1 0. eanaliculatus. Nigi^o-fiiscus, cinereo-subnehulosus, subtus albidus, thorace 

 canaliculd dorsali sat profunde impressd, antennis pedibusque viceo-rufescen- 

 iibus. (Long. corp. 1^ — if lin.) 



Cu. eanaliculatus. Mus. Marsham.—Rh. eanaliculatus. Steph. Catal. 157. No. 

 1594. — Rh. inconspectus. Steph. Catal, 157. No. 1596. var. > 



Broiun-blaclc, slightly clouded with cinereous, beneath whitish: head and thorax 

 granulated, the latter luith a rather deep dorsal channel, having a dense patch 

 of luteseent scales behind, and with a small dot of similar scales on each side, 

 anterior to the dentation : elytra rather faintly T^\ixicta,te-striated, the inter- 

 stices granulated and slightly clouded with luteseent scales ; the base of the 

 suture also somewhat luteseent ; legs and antennee pitchy-red. 



Not common : it has occurred near London in June, and in Nor- 

 folk and Somersetshire. 



B. With the thorax quadrituberculate. 



Sp. 11. quadrituberculatus. Niger, supra cinereo-nebulosus, subtus albtdo-squa- 

 viosus, tibiis testaceis, thorace depresso, foveolato . (Long. corp. 1^ lin.) 



Rhy. 4-tuberculatus. Fahricius. — Rhi. 4-tuberculatus. Steph. Catal. 157. No. 

 1595. 



Black; beneath whitish: head depressed: thorax also depressed, with three 

 foveolce on the disc, two small tubercles on the anterior margins, and two 

 larger acute ones on the sides : elytra rather convex, punctate-striated, the 

 interstices coriaceous, clouded with ashy-white scales : legs elongate, slender, 

 femora dusky, with a cinereous ring towards the apex, tibiae and tarsi ferru- 

 ginous : antennas rufescent, with the club dusky. 



Also somewhat uncommon : found at Hertford in June : it like- 

 wise occurs in Norfolk, and I believe in the New Forest. 



Sp. 12. quadricornis. Niger, subtus albido-squamosus , antennis pedibusque totis 

 testaceis, sutures basi alhd, thorace convexiori. (Long. corp. l^^l^ lin.) 



Rhy. 4-cornis. Gyllenhal—Wixi. 4-cornis. Steph. Catal. 157. No. 1597. 



Black; with whitish scales beneath: thorax rather corawe^, deeply punctate, but 

 not foveolated, the sides densely clothed with white scales; and having a single 

 acute tubercle, the anterior margin with two small ones: elytra immaculate, 

 punctate-striated, with the base o/the suture white : antennae and legs entirely 

 testaceous, the apex of the femora sometimes fuscescent. 



My specimens were found within the metropolitan district. 



Genus CCLXXXVI. — Mononychus, Schuppel. 



AntennoE geniculated, 12-jointed, short, slender ; funiculus 7-jointed, the arti- 

 culations obconic, the exterior ones gradually shorter; club oblong, oval, 

 acuminated. Rostrum elongate, rather slender, bent, cylindric, lodged during 

 repose in a pectoral groove : head longitudinally carinated : thorax transverse. 



