«64 PROCEEDINGS OF THE ACADEMY OF [Jan., A STUDY OF THE SPECIES OF THE GENUS DICHOPETALA (ORTHOPTERA: TETTIGONIID^). BY JAMES A. G. REHN AND MORGAN HEBARD. The possession of the extensive series of this genus secured by us in the southwestern' United States in the summers of 1910 and 1912, with the acquisition by the junior author of the very important representation of the same group contained in the Bruner Collec-tion, prompted us to make a detailed study of this interesting but previously little-known genus of long-horned grasshoppers. The scope of our work became so extended that practically all the material of the geniis in American collections was finally examined. The few types contained in European collections were relatively unimpor-tant. Our work has required the description of a number of new forms and the synonymizing of several old ones. The color descriptions have been based on Ridgway's recent set of color standards.^ DICHOPETALA Bruimer. 1878. Dichopetala Brunner, Monogr. der Phaneropt., p. 77. 1891. Dichopetala Brunner, Verhandl. K.-K. Zool.-bot. Gesell., Wien, XLI, p. 4. 1897. Dichopetala Saussure and Pictet, Biol. Cent.-Amer., Orth., I, p. 315. 1900. Dichopetala Scudder, Proc. Davenp. Acad. Nat. Sci., VIII, p. 67. 1900. Dichopetala Hehn, Trans. Amer. Entom. Soc, XXVII, p. 88. 1901. Dichopetala Rehn, Entom. News, XII, p. 207. 1902. Dichopetala Rehn, Trans. Amer. Entom. Soc, XXVII, p. 335. 1902. Dic/iopf-tato Scudder and Cockcrell, Proc. Davenp. Acad. Sci., IX, p. 51. 1902. Dichopetala Morse, Psyche, IX, p. 381. 1906. Dichopetala Kirby, Synon. Catal. Orth., II, p. 388. 1907. Dichopetala Rehn, Proc. Acad. Nat. Sci. Phila., 1907, p. 56. 1909. Dichopetala Rehn and Hebard, ibid., 1909, p. 167. 1912. Dichopetala Hunter, Pratt and Mitchell, Bull. 113, Bureau of Entom. U. S. Dept. of Agric, p. 50. This genus was based on two species — inexicana and eniarginata Brunner. Genotype: Dichopetala mexicana Brunner (selected by Kirby, 1906). The genus is a member of the Phaneropterinse and of the group Odonturge, constituting with the genera Odontura Rambur, Pseudi-sotima Schulthess, Epiphlebus Karsch, Atlasacris Rehn, Peropyrrhicia ' Color Standards and Color Nomenclature. By Robert Ridgway. Wash-ington, D. C, 1912.