Mentum semicirculare antice rotundatum margine antico emarginato. Caput porrectum oculis prominentibus thorace haud angustius. Thorax convexus antice posticeque marginatus lateribus rotundatis haud marginatis. Scutellum triangulare subacutum. Abdomen thorace fere duplo latius. Elytra humeris eminentibus marginatis, lateribus parallelis. Pedes pentameri articulis tribus tarsorom primis ciliatis pulvillatis dilatatis, penultimo bilobo, ultimo tenui biunguiculato. Femora postica valde incrassata intus unidentata. Tibiae posticae compressae apice dilatatae angulo externo acuto. Obs. The structure of the tarsus in this genus, so near in affinity to Carpophagus and Sagra, has led me to investigate more minutely the tarsus in the tetramerous and trimerous insects of the French entomologists, and the result has been that the arrangement given in the third volume of M. Cuvier's Regne Animal, is discovered to be as erroneous in point of description, as it is inconsistent with natural affinities. 74. Prionus bidentatus. Don. Ins. of New Holland, table 6. 75. Prionus fasciatus. Don. Ins. of New Holland, table 6. 76. Prionus spinicollis (n.s.) P. piceus antennis filiformibus basi nigris articulo ultimo vix crassiore, capite fusco tomentoso, thorace nigro-fusco punctis scabroso, lateribus spinulosus, in medio postice carina laevi tuberculoque utrinque magno compressa scabro; scutello piceo nigro-marginato, elytris testaceis punctulatis substriatis apice unidentatis, pectoris lateribus rufo-tomentosis. 77. Distichocera maculicollis. Kirby, in Linnean Transactions 12. 78. Distichocera ? rubripennis (n.s.) D. rufo-testacea subtomentosa, capitis lateribus oreque nigris, vertice canaliculato, antennis nigris articulis vix biramosis ramis sinistris brevissimis, thorace atro vitta utrinque rufotestacea, scutello nigro, elytris rufo-testaceis tomentosis apice obtusis dehiscentibus, corpore cuneiformi subtus villo argenteo micante, abdomine utrinque nigro maculato, pedibus nigris. Obs. This insect may be considered a Molorchus with elytra as long as its wings; and it, therefore, evidently connects this genus with Distichocera. 79. Clytus thoracicus. Don. Sys. of New Holland, table 5. Obs. This insect leaves the typical form of Clytus, so much as to make me hesitate in placing it in the genus. 80. Callidium bajulus. Fab. Syst. Eleulh. 2 333. 2. Obs. This insect answers perfectly well to the specific description as given by Fabricius, but is rather larger than the European insect, and has eight obsolete white spots disposed in two parallel bands on the back of the elytra. 81. Callidium erosum (n.s.) C. nigrum capite punctato, ore testaceo, antennis apice fuscis, thorace tomentoso punctato vel potius punctis confluentibus eroso disco rufo medio subtuberculato, elytris acuminatis apice deflexis lineis duabus elevatis interstitiis punctis confertissimis pulcherrime erosis sutura margineque rufis, corpore subtus pedibusque tomentosis.