170 Mr. J. O. Westvvood's Description 



XI. Description of a new Genus of Carabideous Insects 

 from the Upper Amazon River, Brazil. By J. O. 

 Westwood, Esq., M.A., F.L.S., &c, 



[Read 1st February, 1858.] 



In one of the many boxes of insects collected and sent by Mr, 

 Bates from the Upper Amazon River were several specimens of a 

 small beetle of a very peculiar prima, facie appearance or habit, 

 diflering from every known form, but having the nearest apparent 

 relationship to certain Heteromerous beetles, such as Adelostoma, 

 or the smaller species of Nosoderma, &c., as well as to the genus 

 Rhysodes ; the sub-parallel form of the body, sulcated prothorax 

 and elytra, and obscure luteous covering of the tegument, agreeing 

 with the general appearance of some of the former of these forms. 

 On examining the tarsi it became evident, however, that the insect 

 was Pentamerous, whilst the digitated structure of the anterior 

 tibiae, the organization of the trophi, and the filiform antennae, 

 indicated the family Curab'idce and sub-family Scaritides as the 

 legitimate situation of this remarkable form, although very distinct 

 from all the known genera of that sub-family. 



Order COLEOPTERA. 



Family CARABID/E. 



Sub-family Scaritides. 



SOLENOGENYS, WestW. 



Corpus oblongum, lateribus sub-parallelis, dorso sub-planum, 

 supra obscurum, punctatum, et sulcatum ; coUo et parte pos- 

 tica pronoti constrictis, inde corpora quasi tripartite. 



Caput magnitudine prothoracis, sub-triangulare, angulis posticis 

 liberis rotundatis paullo-elevatis, margino antico truncato, 

 disco irregular! bisulcato, parteque antica sulcis brevioribus 

 impresso. Caput infra sulcis duobus obliquis profundis 

 postice convergentibus, ante prosternum conjunctis, pro an- 



