REMARKS ON THE COLEOPTERA. 



205 



TLATYNUS Bon. Brulle', 1835. 

 Agonum Bon. Kirby, 1837. 

 Anchomenus Bon. Er. 1837. 

 decens. 



Feronia decentis Say. Am. Tr. 2, 53. 



Anchom. decens Lee. 221. 



Anchom. gagafes Dej. 3, 107. 

 depressus. [Lee. 221. 



Anch. dep. Ed. P. Ac. 1, 299: 

 marginatus. 



Anch. marg. Lee. 221. 

 angusticollis. 



Anch. angus. Lee. 222. 

 extensicollis. 



Feronia extens. Say. Am. Tr. 2, 54. 



Anch. extens. Dej. 3, 113. 

 decorus. 



Feronia dec. Say. ib. 2, 53. 



Anch. deo. Dej. 3, 115. 

 subcordatus. 



Agonum erythropus Kb. N. Z. 28. 

 cupripennis. 



Feronia cup. Say. Tr. 2, 50. 



nitidulus. 



Agonum nit. Dej. 3, 143. 

 chalceus. 



Agonum ch. Lee. 224. 

 cupreus. 



Agonum cup. Dej. 5, 735. 



9 atratus. 

 carbo. 

 anchomenoides. 



Agonum anch. Randall, B. J. 2,2, 

 placid us. 



Feronia placida Say. Am. Tr. 2, 43. 



Ag. luctuosum Dej. 3, 172. 

 lenis. 



Agonum lenum Dej. 



picipenne Kb. N. Z. 24. 

 sordens. 



Agonum sord. Kb. N. Z. 25. 



10 ruficoruis. 

 retractus. 



Ag. relractum Lee. 228. 

 nigriceps. 



Agonum nig. Lee. 229. 



8 Erichson calls this group Anchomenus, and adds as a reason that Platyna (Wiedemau 

 1825) is a genus of Diptera. Before that time the three Bonellian genera were consid- 

 ered distinct, and therefore the name was not vacant ; Brulle having been the first to 

 unite these genera, had an unquestionable right to select either of the three names for 

 the group. Moreover the name Platynus is suitable for the great majority of the 

 species, and the day has long gone by in science, when a generic name may be changed 

 because its meaning does not accord with the characters of all the species denoted by it. 



9 P. atratus. Niger nitidus, thorace rotundato, latitudine vix breviore, antice sub- 

 angustato, basi utrinque late foveato, margine depresso, versus basin anguste reflexo, 

 angulis posticis nullis ; impress, basalibus brevibus distinctis ; impress, transv. poste- 

 riore distincta ; elytris thorace latioribus, profunde striatis, interstitio 3 io 3-punctato. 

 Long. -34. Very much like P. melanarius (Ag. melan. Dej.) but distinguished by the 

 smooth basal fovese and less reflexed margin. The ely tral stria? are smooth in one spec- 

 imen, obsoletely punctured in the other. 



P. carbo. Niger, nitidus, thorace rotundato, latitudine paulo breviore, basi vix ro- 

 tundato, angulis posticis valde obtusis, rotundatis, basi utrinque late foveato, margine 

 depresso versus basin angustissime reflexo; imp. trans, posteriore profunda, basalibus 

 minutis in foveis sitis ; elytris thorace latioribus, tenue striatis, interstitiis planis, 3' 

 3-punctato. Long. -35. One specimen. Very like P. (Ag. Dej.), with the basal 

 fovea? deeper and more defined, the reflexed margin narrower and the margin itself 

 thickened. The base of antennae and palpi have no tendency to become ferruginous. 



10 P. ruficornis. Elongatus, nigro-piceus nitidus, thorace fere piano, latitudine lon- 

 giore, postice subangustato, basi cum angulis rotundato, margine versus basin anguste 

 acuteque reflexo, non incrassato, impress, basalibus fe^e nullis : elytris ellipticis tenue 



