Revisionary Notes on the genera of Eucheilini (Coleoptera, Carabidae)

In the course of my studies on Neotropical Carabidae I have discovered several interesting taxonomic novelties about the endemic tribe Eucheilini which seem to be important enough to be reported on. Even though I have examined the types of the species of Eucheilini which are preserved in the Museum National d’Histoire Naturelle, Paris, in July, 9642, it is as yet imposible to revise the tribe at the species level, since the species of Irma, one of the two genera of Eucheilini, are very poorly under.stood at present. Material in collections is very scarce. I hope that in the near future accumulation of enough specimens will allow a specific revision of-this interesting tribe o Carabidae. The material on which this revision is based has been borrowed (and partly also studied in loco) from the Departamento de Zoologia, S,o Paulo (CDZ), the Museu de la Universidad de La Plata, Argentina (MLP), the Museum of Comparative Zoology, Cambridge, Mass. (MCZ), the Museum National d’Histoire Naturelle, Paris (MNHN) and the United States National Museum, Washington, D. C. (USNM). The loan of this interesting material is gratefully acknowledged. The tribe and the genera included in this revision are not formally redescribed, since, it seems to me that for the time being the characterization presented below is enough.