βομβύκιον
From LSJ
ἐν ταῖς ἀνάγκαις χρημάτων κρείττων φίλος → it is better in times of need to have friends rather than money, a friend in need is a friend indeed (Menander, Sententiae monostichoi 143)
English (LSJ)
[ῡ], τό, species of
A mason-bee, Chalicodoma muraria, Arist.HA 555a13 (v.l. βομβυκοειδῶν). 2 small buzzing insect, Sch. Ar.Nu.158. II cocoon of silk-worm, Arist.HA551b14.