ἐπίτακτοι

From LSJ

διώκει παῖς ποτανὸν ὄρνιν → a boy chases a bird on the wing, vain pursuit

Source

Russian (Dvoretsky)

ἐπίτακτοι: οἱ эпитакты, резерв, арьергард Thuc.

Lexicon Thucydideum

subsidia, supports, reserves, 6.67.1, [vulgo commonly ἐπιτακτῶν]