Genus Centrinus and its Allies^ 329 



anterior coxee approximate ; mesosternura depressed ; first 

 abdominal suture distinct ; femora toothed ; claws united. 



Of the two genera described below, Enops is perhaps some- 

 what doubtful as an ally of Centrinus. 



Xenisus. 



BostrutQ longissimum, filiforme, arcuatum ; scrobes laterales ; an- 

 tennas tenues, clava elongata, cylindrica ; prothoracis basi vix 

 bisinuata ; elytra triangularia : pectus ampliatum, baud canali- 

 culatum : mesosternura latum, elevatum, antice verticale ; abdo- 

 men segmeutis duobus basalibus valde ampliatis, conjunctis ; 

 coxae antica^ separata) ; femora mutica ; unguiculi liberi. 



The cylindrical club differenhates Centrinus from Cylindro- 

 cerus, from which it was at tirst separated by Schonherr as a 

 subgenus ; the character, however, is confined to the males, 

 and is present in the genus before us, whose remarkably 

 slender rostrum throughout is almost unique among the 

 Curculionidaj. 



Xenisus curvirostris. 



X. subellipticus, glaber, niger, nitidus ; prothorace castaneo ; elytris 

 in medio flavis ; rostro corpora longioro, valde arcuato ; antennis 

 piceis, articulis 2°-7°' apice setosis. Long. 3| lin. 



Hah. Columbia. 



Subelliptic, smooth, glossy ; prothorax chestnut-brown ; 

 elytra tlavous in the middle ; rostrum longer than the body 

 the curve semicircular ; scrobes lateral, beginning at one third 

 from the base ; antennaj black, slender ; funicle elongate, the 

 first joint as long as the club, the second to the seventh with 

 setiform hairs at the apex ; prothorax transverse, constricted 

 at the apex, the base slightly bisinuate, nearly impunctate ; 

 scutellum subquadrate ; elytra subtriangular, as broad as the 

 prothorax at the base, the shoulders generally rounded, striate- 

 punctate, punctures oblong, approximate, interspaces very 

 convex, a broad fulvous band across the middle, nearly ex- 

 tending to the apex ; body beneath glossy black, metasternuni 

 at the sides covered with golden-yellow scales ; legs glossy ; 

 femora subclavate, mutic ; tibije straight ; tarsi with the third 

 joint broadly bilobed ; claws free. 



Enops. 



Rostrum elongatum, basi vix incrassatum, arcuatum, apice paulo 

 latius ; scrobes laterales ; antennae tenues, clava ovata ; pro- 

 thorax trausversus, ad latera in medio dilatatus, basi bisinuatus ; 

 elytra late triangularia ; pectus breve, prof unde caualiculatum ; 



Ann. & Mag. N. Hist. Ser. 6. Vol. iv. 23 



