tippŭla (tip-), ae, f.,
an insect that runs swiftly over the water , the water-spider , water - spinner , Varr. ap. Non. 180, 11. — Transf., of any very light object: neque tippulai leonis pondu'st quam fides lenonia, Plaut. Pers. 2, 2, 62; v. Ritschl ad h. l.