Key to species of A. ( Alnetoidia) in Korea

1. Aedeagus with a pair of denticulate apical processes.................................................. A. xantha

- Aedeagus with a pair of subapical processes................................................................ 2

2. Subapical processes of aedeagus reaching to level of shaft tip in caudal view........................... A. sapporensis

- Subapical processes of aedeagus apparently shorter than level of shaft tip in caudal view............................. 3

3. Aedeagal shaft with prominent median constriction ventrally in lateral view; subapical processes gently pointed............................................................................................. A. jejudoensis sp. nov.

- Aedeagal shaft gently curved ventrally in lateral view; subapical processes with outer margin subtriangularly produced............................................................................................... A. straminea