The headword is nominative plural, but ambiguous as to gender (masculine or feminine). The gloss, which uses the feminine definite article, shows that the lexicographer is thinking of it as feminine. In the quotation, the adjective appears in the accusative plural, but in agreement with a feminine noun.
cf. epsilon 2327.
[1] An approximation of Theophylact Simocatta, Histories 5.8.9; Roman general Narses (cf. epsilon 1313), awaiting reinforcements west of Lake Matiane (Kapauta, Spauta; present-day Lake Urmia, in northwest Iran; Barrington Atlas map 89 grid H3), advises John to wait until their forces unite before engaging Persian rebels under Baram (summer 591); cf. de Boor (203), Whitby (143), and epsilon 2631. On John, Roman general in Armenia 589-591, see PLRE IIIa s.v. Ioannes(101). On Baram see beta 103 generally. For Narses, Roman general under Justinian I (reigned 527-565, cf. iota 446), see generally nu 42.