■ 'otober, 1874.] 97 



apical antenna! joint of Carenum. In form it most nearly resembles C. 

 BoneUii, but it is ratlier narrower, and tbe elytra are more rounded 

 at tlie slioulders and distinctly flattened for a considerable breadth on 

 each side of the sutui'e, the limits of the flattening being distinctly 

 marked. The head is similar in form, but presents several striking 

 points of difference ; the transverse depression behind the eyes is deep 

 and continuous right across ; the eyes are much less prominent ; the 

 lobes of the clypcus in front of the eyes are not distinctly grooved, 

 and lastly, the labrum is straight, or even somewhat emarginate, in 

 front, with a row of distinct large punctures. The maxillary palpi 

 have their terminal joint nearly linear. The elytra have no trace of 

 sculpture beyond the posterior fovea and a cluster of ocellated punc- 

 tures at the base, lying in irregular depressions, with the usual 

 marginal punctures. The margins are thickened near the apex. 

 Nicol Bay ; West Australia. 



Caeexum pla>'ipexxe, sp. n. 



Elongatum, parallelum, depressum, elytrorum dorso late fortiter 

 planato ; nigrum, nitidum, thoracis marginibus angustis elytrisque omnino 

 smaragdinis ; cajnte htto, rodundato ; suJcis frontal ihus longis, fori iter 

 curvatis ; oculis hand prominulis ; thorace paulo transverso,hasi lohato ; 

 elytris humeris elevato-dentatis, postice bipunctatis ; tihiis anticis li- 

 dcntatis. Long. 10 lin. 



The head resembles much that of Carenidium, to which genus the 

 species would belong, were it not that the labrum is not emarginatcd, 

 but trisinuate, and approaching that of the typical Garena. The labial 

 palpi, too, are not so strongly dilated as in Garenidiiwi; but the max- 

 illarios arc more dilated than in Carenum. The species, therefore, is a 

 connecting liuk between the two genera. The body is elongate, 

 parallel-sided and depressed, with the elytra flattened for a broad 

 space on each side of the suture ; the colour is olive-black, m ith the 

 margins of the thorax and the whole elytra clear green, the colour 

 being duller along the centre of the latter. The antenna) are slender, 

 with the apical joint tapering, and the sides of the joints only densely 

 pubescent. The frontal furrows are curved, and so strongly impressed 

 that the lateral intervals resemble orbits, and the eyes are not promi- 

 nent. The thorax is a little broader than long, parallel-sided until 

 near the base, where it is sinuate-angustate to the distinct basal lobe. 

 The elytra are retuse at the base, with rather advanced and dentate 

 shoulders, the lateral margins are thickened as in Eutoma ; the surface 



