402 Mr. Kirby's Century of Insects. 



Mandibulce breves, validissimae, corneae, apice edentulae integer- 

 riniae extus rotundataj intus acuta; incurvEe. 



Maxilla mandibuliformes, arcuatae, breves, validae, corneae, lobo 

 edcntulo fornicato, apice subemarginato. 



Palpi subclavati. 



Antcnncc decem-arliculat2e : clava triphylla, semiovata, pilosa. 



Poststcrnum caput versus protensum, conicum. 



Unguiculi onines simplices. 



I have given the characters of Anoplognathns, as well as of the 

 two genera 1 have here established, that I might afford a clearer 

 view of those particulars in which they diflFer, in order that the 

 claim of the latter to be considered as distinct genera may be more 

 readily perceived. In habit and external appearance they cer- 

 tainly appear very unlike each other; but their oral organs are 

 upon the whole so similar, that from these they might perhaps be 

 thought to belong to the same genus, and be well arranged under 

 Anoplognathns. A near view of them, however, will I trust jus- 

 tify me for giving them as distinct. 



In the first place, Anoplognnthus is distinguished, besides its 

 general habit which at first sight appears different, from both 

 Gemotes and Apogonia by the remarkable protended conical post- 

 sternum observable in all the species of that genus; in the next, 

 by having all its claws simi>Ie and undivided ; in this respect re- 

 sembling Rntela. Its labium also is of a different shape, unless 

 it may be regarded as connate with the mentum. From Geniates 

 it differs in having maxillcE without teeth at the end and very 

 concave, and, wi)ich is important, its antenna? have one more 

 joint. Those remarkable circumstances, peculiar to the males 

 of Geniates, of a stiffly-bearded mentum and dilated anterior tar- 

 si, furnish also a striking distinction. From Apogonia it may be 



known 



