Stereocephalus, Lynch Arribalzaga, 1884

Key to males of Stereocephalus View in CoL , modified from Matějíček, 2017

1. Dorsum of head with two impunctate, polished, medial spots (fig. 1 in Herman, 1979)............................... 3

- Dorsum of head without impunctate, polished spots (figs. 38, 45 in Herman, 1979)................................. 2

2(1). Aedeagus with apex of dorsal sclerite pointed (fig. 37 in Herman, 1979).................................... S. ruhus View in CoL

- Aedeagus with apex of dorsal sclerite deeply bifurcated (fig. 42 in Herman, 1979)......................... S. myrigeus View in CoL

3(1). Aedeagus, in lateral view, with ventral sclerite abruptly bent upward subapically and with poll pick-like or club-like apical ornamentation (fig. 3 in Matějíček, 2017)............................................................ S. agostii View in CoL

- Aedeagus, in lateral view, with ventral sclerite gradually or moderately curved to apex (figs. 12, 24 in Herman, 1979)..... 4

4(3). Ventral sclerite of aedeagus, in parameral view, with slender, pointed apex (fig. 11 in Herman, 1979)....... S. seriatipennis View in CoL

- Ventral sclerite of aedeagus, in parameral view, with apex blunt................................................. 5

5(4). Apex of ventral sclerite of aedeagus, in parameral view with shallow emargination in middle; apex of dorsal plate continuous (fig. 26 in Herman, 1979:)..................................................................... S. rinnanus View in CoL

- Apex of ventral sclerite of aedeagus, in parameral view, convex; apex of dorsal plate bifurcate....... S. ikiamensi s sp. nov.