506 COLEOPTERA 



considerable depression ; their surface generally is uneven and punc- 

 tured in rows. Antenna, robust, of normal structure, inserted at the 

 middle of the rostrum. 



In the typical species the antennae of the male are inserted close to 

 the apex, in the female a little before the middle of the rostrum ; the 

 elytral elevations form two sides of a triangle. 



Length (rost. excl.), 3 lines ; breadth, i J. 



I took one $ off Fagus at Parua. 



Idotasia. 



I regret having been unable to find the description of this genus, 

 and I have no examples of any of the species from which the generic 

 characters might have been derived. 



900. I. egena, Pascoe; Ann. Mag. Nat. Hist., Jany., 1876. /. 

 elliptica, nitide nigra ; rostra pone basin fortiter arcuato, dimidio basali 

 antice punctis magnis oblongis approximatis impresso ; oculis grosse 

 granulatis ; antennis fulvo-ferrugineis ; clava oblongo-ovata ; prothorace 

 sat vage punctato ; dytris vage leviter punctulatis ; pedibus piceis. 



Long., if lin. 



Waikato (Captain Hutton). 



This species is more nearly allied to the Batchian /. scaphioides than 

 to either of the Australian members of the genus ; it is, however, 

 broader and less convex, the posterior portion of the elytra less attenuated, 

 the intervals of the punctures on the rostrum less decidedly elevated or 

 cariniform, &c. Idotasia now contains nine species, five from New 

 Guinea and the neighbouring islands, two from Queensland, one from 

 New Caledonia, and the above. They are very homogeneous, except 

 the one from New Caledonia, but are differentiated by well-marked 

 characters. 



Genus of Doubtful Position. 

 Aldonida. 



Nov. gen. 



Body oblong, transversely convex, very A !(f onus-like. 



Rostrum stout, as long as the prothorax, a little contracted behind ; 

 scrobes deep, beginning near the apex and extending below the rostrum 

 to the eyes. Eyes sub-ovate, their greatest bulk above, coarsely facetted. 

 Head immersed up to the eyes. Prothorax large, subovate, a little con- 

 stricted in front, rounded laterally, the base and apex sub-truncate. 

 Scutellum small. Elytra rather short, not much longer than the thorax, 

 their shoulders not greatly exceeding the width of the thorax at the base, 

 parallel-sided, apex obtuse. Legs robust ; femora scarcely clavate, some- 

 what notched near the extremity ; tibia stout, flexuous, acutely produced 



