CURCULIONIDAE. 461 



sharp edge at the apex, which is more or less emai'g'iiiate, and 

 without apical scar or deciduous piece. The uieutuin is toleraljly 

 large, trapezoidal, and flat, retracted with the gular peduncle, 

 which is broad; the posterior edge of the latter is prominent, so 

 that the mouth api)ears hollow ; the maxillae are exposed, as are 

 also the ligula and palpi. 



The beak is as long as the prothorax, rather stout, usually a 

 little wider at tip, with distinct apical wings; the tip is feebly 

 emarginate, and marked also in the first two genera with a deep 

 angulated impression ; and (except in Lophalophus) a medial 

 groove. The eyes are transverse, narrowed below, and finely 

 granulated. The antennae are geniculated; the scape long, the 

 funicle seven-jointed (the first and second joints longer), the club 

 annulated, oval, pointed; the antennal grooves usually long, well- 

 defined, narrow, and reaching nearly to the lower angle of the 

 eye, except in Lophalophus, where they are wider and shorter. 

 The prothorax is distinctly lobed behind the eyes; the front coxae 

 are contiguous and prominent. The metasternum is nearly as 

 long as the first and second ventral segments, and the side pieces 

 are narrow; first, second, and fifth ventral segments long; third 

 and fourth united eqnal to either of the others. Legs moderate 

 in length, slender; tibia3 truncate at tip, hind pair not mucroiuUe 

 at the inner angle; tarsi dilated, claws entire, separate. 



Our genera are as follows : — 



A. Beak deeply channelled ; tarsi brush-like beneath ; 



Elytra oval, nearly smooth with faint striae. Triglyphus. 



Elytra oblong oval, with distinct humeri, scabrous punctured, with 



distinct rows of punctures. Plinthodes. 



B. Beak more finely channelled ; 



Tarsi se'tos(> beneath ; elytra with strong rows of punctures, pubes- 

 cence mixed with scaleci. Acmaegeniiis. 



Tarsi brush-like beneath, elytra with obsolete stri;p, pul)esc('n<t' 

 above not mixed with scales. Trichalophus. 



C. Beak finely carinate ; elytra with rows of punctures, squamose, with 



small intermixed bristles. Lophalophus. 



D. Beak not carinate; body covered with scales with rows of bristles on 



the elytra ; second joint of funiculus mucli shorter tliau first, equal 

 to the tliird. Lepidophorus, 



Lophalophus difi'ers from the European Alophus, chiefly by 

 the beak having latei'ul grooves, which are wanting in the latter 

 genus. 



