Key to genera related to Phthia 1 Metathoracic peritreme bilobate (Fig. 16); clavus and corium rather dull or scattered with metallic iridescence. ....................................................................................................... 2 – Metathoracic peritreme undivided, not bilobate (Fig. 17); clavus and corium entirely with metallic green iridescence. ........................................................... Phthiadema gen. nov. 2 Body surface entirely rather dull; humeral angles truncate, not exposed (Fig. 19). ......... .................................................................................................... Phthiacnemia gen. nov. – Body surface scattered with metallic iridescence; humeral angles acute to subacute (Figs. 1, 4). ................................................................................................................................ 3 3 Posttylar depression absent; hind femora dorsally tuberculate; humeral angles remarkably expanded into large and acute spine directed outward and forward (Fig. 4); calli with two conspicuous projections (less developed in females) each lateral to midline. .................. .................................................................................................... Rhytidophthia gen. nov. – Posttylar depression forming single sulcus; hind femora dorsally smooth; humeral angles tapering into short or medium size acute to subacute spine, directed outward and never forward (Fig. 1, 5); calli without spine projections. ....................................................... 4 4 Dorsal surface of head entirely metallic green; anterolateral borders of pronotum dentate; posterior lobe of pronotal disk without longitudinal medial carinae; abdominal sterna III–VI lateral to midline without yellowish to reddish orange maculae. .......................... ........................................................................................................ Phthiarella gen. nov. – Dorsal surface of head entirely rather dull; anterolateral borders of pronotum smooth; posterior lobe of pronotal disk with low longitudinal carinae; abdominal sterna III–VI lateral to midline with rectangular yellowish to reddish orange maculae. ........................ ............................................................................................................... Phthia Stål, 1862

Published as part of Brailovsky, Harry, 2009, Revision of the Phthia generic complex with a description of four new genera (Hemiptera: Heteroptera: Coreidae: Coreinae: Leptoscelini), pp. 59-74 in Acta Entomologica Musei Nationalis Pragae 49 (1) on pages 60-63, DOI: 10.5281/zenodo.4503658