There exists Simiou Pteryges ( the Wings of Simias) on which I
modelled the format of  Wings, playing with form.
(Bucolici Graici, A.S.F.Gow, Oxford Classical texts, University press
Oxford1958, page 172)

Copying from the web:
"The  researcher Armando Zarate observes, "Theocritus of Syracuse (308-240
B.C.), under  the protection of Ptolemy Philadelpho and creator of bucolic poetry,
is considered the    first to devote himself to writing this kind of poems." He adds:
          " Perhaps even more ambitious of intentions than Theocritus was
Simias of Rhodes. Contemporary of Callimachus and Euclid..."