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(owing to the forward deepening o£ tlie concavity o£ the sur- 

 face) becoming more so towards the front, till in the middle of 

 the anterior edge it forms a rampart about half as high as the 

 whole clypeus is long. The front face of the clj^peus is per- 

 jDcndicular, and somewhat higher than the apical joint of the 

 maxillary palpi is long ; at the bottom of this perpendicular 

 face the labrum projects in a plane exactly at right angles 

 with the plane of tlaat face. The labrum is a thin plate 

 scarcely at all thickened in the middle, and only very slightly 

 bent into an arch transversely ; it is widely gentl}^ and trian- 

 gularly emarginate in front with rounded front angles and 

 sides, its width about three times its greatest length ; 

 it projects forward from the perpendicular face of the 

 clypeus in such manner that each of its lateral mar- 

 gins is about as long as the apical joint of the maxillary 

 palpi, and that its length down the middle is about half 

 that of the sides (I do not know any other Australian 

 Melolontlia whose labrum approaches this form). The mentum 

 is a little longer than wide, with its ligular suture not defined, 

 abruptly narrowed at the insertion of the labial palpi and con- 

 tinuing to contract slightly thence to xhe apex which is sub- 

 truncate and about half as wide as the base ; the surface is 

 clothed with long hairs, and a membranous lobe projects 

 obliquely on either side underneath the basal joint o£ the 

 labial palpi. Of these latter the basal joint is elongate-cylin- 

 dric, the second almost globular, the third subconic, and about 

 equal in length to the first. The maxillas are of the same 

 length as the mentum and of a very simple form, the outline 

 externally being a slight even curve and internally an almost 

 straight line ; there are three or four distinct sharp teeth on 

 the inner margin near the apex. The maxillary palpi are in- 

 serted very near the apex of the maxilla, than which they are 

 not much longer ; the basal joint is very small, the second and 

 fourth about equal to each other, the third decidedly shorter 

 than the second or fourth. The club of .the antennae is much 

 longer than the other joints together, and is scarcely shorter 

 than the entire head ; its basal joint is a little shorter than the 

 rest ; of the joints not belonging to the club the first is longer 

 than the other two together, and in shape is bent piriform ; the 

 second joint springs from the inner side of the first a little 

 before its apex, and resembles the first in shape ; the third is 

 equal to the second in length, and is somewhat parallel-sided, 

 in one example, however (probably a male), having a strong 

 sharp tooth projecting from its inner face. The anterior tibia& 

 are very peculiar ; the external margin is strongly dilated with 

 a curved outline to a distance from its base about equal to the 

 length of the antenna! club, at which point the tibia is about 



