Cybocephalidae

Key to Cybocephalidae from Japan

1. Eyes indistinctly visible in ventral aspect. Metaventrite (Fig. 2 A) concave and short, about as long as mesoventrite. Apical margin of inter-metacoxal area of abdominal sternite III (Fig. 2 A) narrow and acuminate (Pastillus). Antennae (Fig. 8 K) tensegmented.................................................................. Pastillus eminentithorax sp. nov.

– Eyes distinctly visible in ventral aspect. Metaventrite (Fig. 2 B) convex and elongate, longer than mesoventrite. Apical margin of inter-metacoxal area of abdominal sternite III (Fig. 2 B) wide and broadly rounded (Cybocephalus). Antennae (Figs. 4 I, 6F, 7I) eleven-segmented.................................................................................. 2

2. Head and anterior margin of pronotum (Fig. 1 C) with metallic luster...................... C. (C.) chlorocapitis sp. nov.

– Head and anterior margin of pronotum without metallic luster.................................................. 3

3. Male pronotum (Fig. 1 A) yellowish. Median lobe of male genitalia (Fig. 4 C) in lateral view extremely thin. Elytral punctures (Fig. 3 B) large, as large as an eye-facet at middle................................ C. (C.) nipponicus Endrödy-Younga

– Male pronotum (Fig. 1 B) black. Median lobe of male genitalia (Figs. 5 P–T) in lateral view extremely thick. Elytral punctures (Fig. 3 C–D) small, smaller than an eye-facet at middle................................... C. (C.) politissimus Reitter