Key to the species of Xenysmoderodes

1. Rostrum without dorsal median carina..................................... Xenysmoderodes sasajii Yoshitake, 2007

- Rostrum with dorsal median carina (Figs. 27, 28)........................................................... 2

2. Median carina on dorsal surface of the rostrum and vertex not connected (Fig. 27); pronotum without acute angle at middle of anterior margin; both sides of pronotal carina with two longitudinal carinae (Fig. 4); middle of ventrite of male with deep concavity (Fig. 5); aedeagal body nearly flat and densely covered with spicules at apex (Fig. 7).................................................................................................. Xenysmoderodes concavus sp. nov.

- Median carina on dorsal surface of rostrum and vertex connected (Fig. 28); pronotum with acute angle at middle of anterior margin; each side of pronotal carina with one longitudinal carina (Fig. 13); middle of ventrite of male with dense patch of setae (Fig. 15), aedeagal body constricted, projected towards apex and densely covered with minute spicules near apex (Fig. 19).......................................................................... Xenysmoderodes flos sp. nov.