Roberts, H.R., 1947. Revision of the Mexican Melanoplini (Orthoptera: Acrididae: Cyrtacanthacridinae) Part I. Proceedings of the Academy of Natural Science of Philadelphia 99: 201-230.
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Roberts, H.R., 1975. A revision of the genus Cylindrotettix including new species (Orthoptera; Acrididae; Leptysminae). Proceedings of the Academy of Natural Science of Philadelphia 127: 29-43.
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Roberts, H.R., 1978. A revision of the tribe Leptysmini except the genus Cylindrotettix (Orthoptera: Acrididae: Leptysminae). Proceedings of the Academy of Natural Science of Philadelphia 129: 33-69.
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Roberts, H.R. & Carbonell, C.S., 1979. A revision of the genera Stenopola and Cornops (Orthoptera, Acrididae, Leptysminae). Proceedings of the Academy of Natural Science of Philadelphia 131: 104-130.
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