450 Mr. Fi'ancis P. Pascoe on 



AMYCTERIN^. 



DiALEPTOPUSj n. g. 



Rostrum breviusculum, crassum, capite angustius ; 

 scrobes iaterales, subai'cuatas, postice fere evanescentes ; 

 antennce tenuatge, articulis duobus basalibus funiculi 

 sequentibus longioribus. Ocidi liberi. Profhorax lati- 

 tudine et longitudiue subsequalis, apice valde productus, 

 supra fortiter longitudinaliter excavatus, bicristatus, 

 utrinque tuberculato-cariuatus. Scutollmn inconspicuum. 

 Elytra protliorace baud vel modice latiora, singulatira 

 bifariam tuberculataj humeris antrorsum valde producta, 

 lateribus inflexa. Pedes elongati, attenuati; tarsi antice 

 modice dilatati^ quatuor postici gracillimij filiformes. 

 Propedus modice elongatum, profunde emarginatum. 



Amycterus collaris, Boh. (Schon. vii. i. 57), which, as 

 Lacordaire suggested, should be separated from Euomus, 

 to which Schonherr eventually referred it, belongs to 

 this genus. The characters given above are mostly 

 antagonistic to Euomus. All the species have the apex 

 of the prothorax projected considerably over the head, 

 and this is bounded above on each side by a strongly- 

 marked crest, which diverges a little, and is continued 

 backwards to the base, leaving a deep broad cavity be- 

 tween them. The elytra, which are about three times 

 as long as the prothorax, have on each two longitudinal 

 series of more or less conical tubercles which converge 

 anteriorly, and the tubercles, gradually reduced to 

 granules, form an elevated border on the very strongly- 

 produced spiuiform shoulder. Schonherr compared the 

 species known to him to Se^ridium tricuspvhitum. 



Diahptopus sepidioides. (PI. A^II. fig. 4.) 



D, angustus, nigrescens, griseo-squamulosus ; rostro 

 capite parura longiore, utrinque fere recto, antice fortiter 

 bicarinato, vage nigro-setuloso ; protliorace parce squa- 

 muloso, cristis dorsalibus oblique granulatis ; elytris pro- 

 thorace haud latioribus, tuberculis ferrugineis, serie 

 exteriore quinque, interiore septem constitutis, apicibus 

 conjunctis late sed leviter emarginatis, dorso dense 

 squamuloso, lateribus denudatis, quadri-seriatim punc- 

 tatis, punctis magnis, squamulis repletis ; pedibus parce 

 squamulosis. 



