100 [October, 



Head very similar to tliat of C. gagatinum, frontal sulci very deep, 

 widely divergent behind and extending mucli beyond the eyes, tlie 

 latter prominent but encased bebind in wide orbits ; labrum deeply 

 emarginated in a curve. Thorax much shorter than in G. gagatinum, 

 and more regularly rounded ; the middle of the base forms a distinct, 

 short, truncated lobe. The elytra are ovate, with shoulders entirely 

 efFaced, convex on their surface, with lateral margins not at all 

 thickened. The anterior tibife have two long teeth ; the middle tibise 

 one short spine. 



Nicol Bay ; West Australia. 



Teeatidium, g. n. 



Corpus maxime elongatum. Talj^i maxillares et lahiales apice di- 

 latissimi ; caput rotundatum ; sulci frontales vix imp)ressi, hrevissimi, 

 postice convergentes. Tihice anticcs unidentatce ; intermedice extus sim- 

 plices. Elytra hasi utrinque plicata, marginihus lateralihus incrassatis ; 

 disco impunctato. Metasternv/ni hrevissimum. 



The extraordinary insect for which this new genus is necessary, 

 agrees with Monocentrum only in the absence of the usual tooth or 

 teeth of the anterior tibiae above the apical one ; but the excessive 

 dilatation of the terminal joint of the maxillary (as well as of the 

 labial) palpi and the very short faint frontal groves, form very distinct 

 and peculiar characters. The head is broader than the thorax, rounded 

 and obtuse in front ; the four teeth of the clypeus are of equal size ; 

 the labrum bisinuate, prominent in the middle. The antennae are 

 naked, with a few large punctures on the margins of the joints. The 

 eyes are large and prominent, encased behind in broad orbits. The 

 thorax is much longer than broad, oblong, but narrowed behind and a 

 little sinuate-angustate near the base. The elytra are cylindrical, but 

 appear broadened behind, owing to the excessive thickness and width 

 of the marginal rims, which, at the sutural apex, are overlapped by a 

 lobular projection of each elytron ; they are slightly narrowed to the 

 base, which has on each side a transverse wheal, posterior to which is 

 a depression containing eight or nine ocellated punctures, but the de- 

 clivous base itself has no such punctures ; the shoulders have a very 

 pi'ojccting tooth, and the base at the suture is concave. 



TERATIDirM MACROS, Sp. II. 



Nigrum, suh-nitidum. Lonq. 13| Jin. 



To the above detailed generic deeoription it mny l)o ndded that 



