Phthia, Stal, 1862

Brailovsky, Harry, 2009, Revision of the Phthia generic complex with a description of four new genera (Hemiptera: Heteroptera: Coreidae: Coreinae: Leptoscelini), Acta Entomologica Musei Nationalis Pragae 49 (1), pp. 59-74 : 60-63

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

Figures

Figs. 11–17. 11–15 – paramere: 11–12 – Phthia lunata (Fabricius, 1787), 13 – Phthiacnemia picta (Drury, 1770), 14–15 – Phthiadema cyanea (Signoret, 1862), 16–17 – metathoracic scent gland peritreme: 16 – Phthia lunata, 17 – Phthiadema cyanea.

Figs. 1–10. 1–5 – pronotum: 1 – Phthiarella decorata (Stål, 1865); 2 – Phthiadema cyanea (Signoret, 1862); 3 – Phthiacnemia picta (Drury, 1770); 4 – Rhytidophthia splendida (Valdéz, 1910); 5 – Phthia lunata (Fabricius, 1787). 6–10 – male genital capsule in caudal view: 6 – Phthiadema cyanea; 7 – Phthiacnemia picta; 8 – Rhytidophthia splendida; 9 – Phthia lunata; 10 – Phthiarella decorata.