μεγάλα ὠφελήσεσθε πρὸς ἱστορίαν τῶν κοινῶν → that will be of great benefit to you in order to understand public affairs
prŏmoscĭda Isid. Orig. 12, 2, 14, et prŏmoscis Sol. 24, 14, c. proboscis.
promoscida, ae, f., s. proboscis.