Entomology definition of Squama: in Odonata, the sclerite that bears the palpus
of both maxilla and labium: the scale-like first abdominal
segment of some ants: a scale-like appendage covering the base of
primaries in Lepidoptera, and so = patagium; q.v.: a small scale
above the halteres in Diptera: in this order Packard uses squama
for the lobed scale and restricts alula to the lobe-like
appendage: Osten-Sacken uses squama for the posterior scale alone
and antisquama for the anterior.