. Catalogue of the Coleoptera of the regions adjacent to the boundary line between the United States and Mexico. Beetles; Beetles; Beetles; Beetles; Beetles. [ 225 ]. ART. XXIIL—Synopsis of the species of Pterostichus Bon. and ^allied genera inhabiting temperate North America. By John L. LeConte, M. D. Although many attempts have been made to dismember the group of Carabica here treated of, yet a close analysis of the genera formed has always shown them to be untenable, and most systematic authors now follow the example of Dejean and Erichson in uniting them into a single genus, by some called
. Catalogue of the Coleoptera of the regions adjacent to the boundary line between the United States and Mexico. Beetles; Beetles; Beetles; Beetles; Beetles. [ 225 ]. ART. XXIIL—Synopsis of the species of Pterostichus Bon. and ^allied genera inhabiting temperate North America. By John L. LeConte, M. D. Although many attempts have been made to dismember the group of Carabica here treated of, yet a close analysis of the genera formed has always shown them to be untenable, and most systematic authors now follow the example of Dejean and Erichson in uniting them into a single genus, by some called Feronia, by others Pterostichus. By those who regard purity in the system of nomenclature, as possessing some claims to importance, the latter name is adopted, as it has priority by several years. In regard to the grouping of the large number of species com- posing this genus, so as to facilitate our knowledge of them, very little has been attempted, and t\e older divisions, at least as defined by Dejean, or by the English authors, so far from being of service, only tend to mislead the student. Being now occupied in writing a synonymical catalogue of the Coleoptera of the United States, I have subjected all our species of Pterostichus to a critical examina- tion, the results of which I here offer, with the addition of diagnoses of all the species observed. The genera made by European authors, such as Platyderus, Argutor, Omaseus, Platysma, Adelosia, &c, I have entirely neglected, as I can find no definitions of them which are recognizable, and it is very doubtful, whether, being founded on merely slight differences in form of body, they should be considered as belonging to anything more than the particular European species, which were chosen as types. The only memoir that I have been able to refer to with any satisfaction, is that of Baron Chaudoir;* and although, as will be" seen in the sequel, I find it impossible to adopt the numerous genera founded by "him,
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Keywords: ., bookcentury1800, bookdecade1850, booksubjectbeetles, bookyear1858
