ἐν γενείου ξυλλογῇ τριχώματος → in the first harvest of a beard, in early manhood
A fly, Arat.523 (with play on αἰητός).
ἀητέομαι: ἀποθ. (ἀήτης) πέτομαι, ἵπταμαι, Ἄρατ. 523.