REHN AND HEBARD 33 STUDIES IN AMERICAN TETTIGONIIDAE (ORTHOPTERA) VII BY JAMES A. G. REHN AND MORGAN HEBARD A REVISION OF THE SPECIES OF THE GENUS ATLANTICUS (DECTICINAE) The acquisition of certain very peculiar types belonging to this interesting genus, not referable to any of the generally recognized forms, made necessary not only the examination of all the material in our possession or in our charge, but also that in the other more important American collections. As a result we have been compelled to completely revise the classification of the genus, to correct the assignment of certain of the older names and to distinguish the more permanent from the many relatively variable, and therefore taxonomically valueless, characters found in the genus. Although the number of valid species in the genus has been considerably increased, but two were previously un-known, as a number of previously synonymized or incorrectly assigned names represent well characterized species, which are here correctly located. ATLANTICUS Sciidder 1838. Declicus Burmeister, Handb. der Eutom., ii, abth. ii, pt. i, p. 709. (Part.) 1859. Orcheslicus Saussure (not of Cabanis, ISol), Revue ct Alagasin de Zoologie, 2e ser., xi, p. 201. 1862. Thyreonotus Scudder (not of Scrvillc, 1839), Boston Journ. Nat. Hist., vii, p. 453. 1893. Engoniaspis Brunncr, Ann. Mus. Civ. Stor. Nat. Genova, xxxiii, p. 185. (No species described.) 1894. Engoniaspis Scudder, Canad. Entom., xxvi, pp. 177, 179. (No species described.) 1894. Atlanticus Scudder, Ibid. TRANS. AM. ENT. SOC, XLII.