126 



Sp. 18. B. Schaumii, Aube. 



B. punctato proximus videtur. 



Obs. — In the Northern States an individual of this genus is scarcely ever seen 

 apart from a colony of ants, but in the South tbey are frequently found under the bark 

 of trees where no ants are seen. The northern species, as far as my experience goes, 

 are found only under stones ; the southern ones (except B. Ionas, and a few specimens 

 flying in twilight) under bark. 



Rhexius, (n. g). 



Antenna distantes, ad frontis marginem inserts, geniculate, clavatae. Palpi max- 

 illares breves, articulo ultimo ovato, acuto. Abdomen subtiliter marginatum, articulis 

 subaequalibus. Tarsi unguiculo singulo. 



1. R. insculptus. Long. .06. 

 Hab. Nov. Aureliani. 



Euplectus, Leach. 



A. Corpus elongatum, elytris depressis, antennarum articulis penultimis crassioribus. 



a. Thorax canaliculars, vel medio foveatus. 



1 . Linearis. Canalicula integra, medio dilatata, capite laevi. 



2. Confluens. Canalicula integra, medio dilatata, capite thoraceque puuctulatis. 



3. Interruptus. Thorace fovea elongata, capite laevi, vertice elevato. 



4. Difficilis. Thorace fovea elongata, capite lsevi, vertice elevato, foveatoque. 



5. Pumilus. Thorace fovea elongata, capite punctulato. 



b. Thorax medio non canaliculate. 



6. Arcuatus. Capite antice arcuatim impresso, postice utrinque foveato. 



B. Corpus convexiusculum. 



a. Thorax subtiliter canaliculars ; antennas articulis 9 — 10 crassioribus. 



7. Canaliculatus. Capite utrinque bi-impresso, elytris confertim punctatis. 



is 



b. Thorax non caniculatus, foveis posticis linea conjunctis, antennarum articulo 

 llmo maximo globoso. Trimium, Aube. 



8. Globifer. Capite arcuatim impresso, elytris stria dorsali brevi. 



9. Dubius. Capite punctato, angulatim impresso, elytris stria dorsali. 

 10. Parvulus. Capite lsevi minus profunde impresso, postice bifoveato. 



Faronus, Aube. 



1. F. Tolulae. Long. .09. 



Specimen unicum ad Tolulae cataractam Georgia? inveni. 



