Key to species of Ecitonides

1 Head 2 times longer than wide........................................................................... 2

- Head more than 2 times longer than wide.................................................................. 8

2 (1) Sternites III-VI with large elongated tubercles.................................. E. soesilae (Makhan 2021:24, fig. 2)

- Sternites III-VI without large elongated tubercles............................................................ 3

3 (2) Antennae longer than the head........................................................................... 4

- Antennae not longer than the head........................................................................ 7 4 (3) Head oblong. Elytron with 5 rows of tubercles.............................................................. 5

- Head increasing the width toward the posterior margin. Elytron with 4 rows of tubercles. Body length 5 mm .................................................................................. E. verrucosus (fig. 1 in Bruch, 1933:13).

5 (4) Antennae about 1.4x as long as head. Elytra 0.8x as long as pronotum. Body length 6 mm ................................................................................................... E. volans (fig. 1 in Assing, 2012: 403)

- Antennae about 2x as long as head. Elytra 1.3 x as long as pronotum............................................ 6

6 (5) Abdominal segments III–V with distinct tubercles. Body length 10 mm ...... E. spectabilis (fig. 1 in Borgmeier, 1932: 398)

- Abdominal segments III–V without distinct tubercles. Body length 10 mm ............. E. constanceae sp. nov. (Figs. 1–3)

7 (3) Antennomeres 7–10 strongly transverse. Tubercles present in tergites III-VI. Body length 5 mm ............. E. fraterculus

- Antennomeres 7–10 not transverse. Tubercles present only in tergite III. Body length 7 mm ....................................................................................... E. brevicornis (fig. 3 in Borgmeier, 1949: plate V)

8 (1) Head 3 times as long as wide. Body length 6 mm ........................... E. tuberculosus (fig. 10 in Bruch 1933: 16)

- Head 4 times as long as wide. Body length 7 mm ...................... E. longiceps (fig. 15 in Wasmann 1900: plate 14)