118 MISCELLANEA ENTOMOLOGICA, NO. III. 



Genus, Teratidium, Bates. 



This genus seems not to differ from Monocentrum except in 

 having the frontal canals very lightly impressed. The only 

 s]iecies is T. macros of Bates from West Australia. I have never 

 seen it. 



Genus, Carenidium, Chaud. 



Head very large, frontal canals deep and diverging behind, 

 mandibles very strong, clvpeus and labrum emarginate. Antennae 

 short, slender, attenuated at the apex. Palpi very broadly 

 securiform. Thorax broader than the length. Elytra oblong- 

 oval ; anterior tibiaj strongly bidentate externally. The abdominal 

 segments with the two setigerous punctures except in C. gagatinxim. 



The insects referable to this genus are of large size and for the 

 most part of great brilliancy. Baron de Chaudoir founded the 

 genus on my Carenum gagatinum, and more recent discoveries 

 have added to it — C. Damelii, Mad. ; Spaldingi, Macl. ; Kreus- 

 lerce, Macl. ; lacustre, Macl. ; scqjj^hiriiium, Bates. My Carenuvi 

 inucronatimi will also fall into this genus, as well as Carenidiiati 

 Darlingense, Chaudoiri, septentriotiale and tropicale new species, 

 tlie descriptions of which are given at the end of tliis paper. 



Genus, Conopterum, Chaud. 



This genus onl}^ differs from Oarenidiuin in the clypeus and 

 labrum not or very little emarginate, the antennae less attenuated, 

 the elytra more pointed towards the apex, and in having a strong 

 erect horn springing from the inner tooth of the mandibles, most 

 conspicuously on the left mandible. 



This genus was suggested by Baron de Chaudoir, but witliout 

 any defined characters, for an insect from North Australia, to 

 which he gives the specific name of insigne. He ascribes to the 

 same genus two species described by Count Castlenau under the 

 names of Carenum superhum and mnahile. To this I have 

 to add my Carenum Riverinoi and the following new species 

 described hereafter — Conopterum violaceum, littorale, Barnardiy 

 and hicornutum. 



