Lewis & Short

Amphĭlŏchĭa, ae, f., = Ἀμφιλοχία, a small province in Acarnania, Cic. Pis. 40; Mann. Gr. 62 sq.
Hence, Amphĭlŏchĭ-us or Amphĭlŏchĭcus, a, um, adj., Amphilochian: Argos Amphilochium, Liv. 38, 10: Argos Amphilochicum, Plin. 4, 1, 2, § 5.
Amphĭlŏchi, ōrum, m., the inhabitants of Amphilochia, Liv. 38, 3.