of three new Genera of exotic Coleoptera. 171 



island of Madeira during his first visit. The species must how- 

 ever be extremely rare or very local, as he failed to detect it again 

 during his second visit, although he repeatedly searched the ad- 

 joining neighbourhood with that object in view. 



ChjEtosoma, Westw. Gen. nov. 



Corpus oblongum, angustum, parallelum, subcylindricum, dorso 



subdepressum, punctatum, longe setosum. Caput porrectum, 



subquadratum, latitudine pronoto aequale. Clypeus trans- 



versus, brevis. Labrum breve, angulis anticis lateralibus 



rotundatis, medio antice subemarginatum. Mandibulce magnae, 



corneae, exsertae, elongato-trigonae, apice subhamato, intus 



dentibus duobus obtusis armatee. Maxilla e lobis duobus 



setosis latis obtusis formatae, interno baud spina armato. 



Palpi maxillares maxillis fere duplo longiores, articulo basali 



minuto; 2do et 3tio aequalibus, apice parum crassioribus, 4to 



praecedenti paullo longiori et crassiori, sensim incrassato, apice 



obtuso. Mentum breve transversum, in scapum corneum 



juguli insertum, lateribus rotundatis, medio late emargina- 



tum. Labium porrectum, profunde emarginatum vel fere 



bifidum, margine antico setoso. Palpi labiales in scapos 



duos latos insidentes, articulo basali breve, secundo fere tri- 



plo longiori, Stio longitudine 2di, subovali, apice oblique 



truncato. Antennae subfiliformes, fere longitudine capitis et 



pronoti, longe setosae, articulo lmobrevi subrotundato, 2ndo 



brevissimo, 3tio ad lOmum fere aequalibus basi singulatim 



angustato, llmo praecedenti vix longiori subovali. Pronotum 



subquadratum, lateribus fere rectis, dorso rude punctatum, 



elytris paullo angustius. Elytra oblonga, basi truncata, 



apice rotundata, angulis humeralibus acute prominentibus. 



Pedes longitudine mediocres, femoribus crassis, tibiis e basi 



ad apicem sensim incrassatis subtriquetris. Tarsi omnes 



5-articulati, articulis 4 basalibus brevibus infra setosis inte- 



gris, oto multo longiori clavato. Ungues basi intus dilatato, 



vix dentato. Pulvillus brevis bisetosus. 



This genus, in its general form, porrected mandibles, filiform 



antennae, and rather elongated legs, with their five-jointed tarsi, 



might at first sight be almost mistaken for some of the narrow 



Harpalidce or Scaritidce, but an inspection of the parts of the 



mouth (those most excellent guides in determining the relations 



of the families of insects in general, and Coleoptera in particular), 



is sufficient to prove that the insect must be referred to the great 



group to which Mr. MacLeay has applied the name of Necrophaga, 



