Hyginus Fabulae, 163 Amazones.

     The Lyre was set among the stars, according to Eratosthenes, for this reason: Having first been formed by Mercury from a tortise, the lyre was given to Orpheus. As son of Calliope and Oeagrus, he was deeply interested in this matter. And thus he is believed by his art to have induced even wild beasts to listen to him. When he was lamenting the death of his wife, Eurydice, he is believed to have descended to the dead below and there to have praised even the offspring of the gods' offspring by his song — all save father Liber (Dionysus). Affected by forgetfulness, Orpheus skipped over Dionysus, as also Oeneus had omitted Diana's name from a sacrifice. Thus, later Orpheus, as most sources say, sat down upon mount Olympus, which separates Macedonia from Thrace — but, according to Eratosthenes, he was sitting on Pangaeus — and as he was taking delight in song, Dionysus is said to have set the maenads upon him so that they would murder him and dismember his body. Others, though, say that, because he had spied upon the mysteries of Dionysus, all this happened to him. The Muses are supposed to have gathered his limbs and buried him. Then with as much affection as they could muster for his memory's sake, they fashioned the Lyre from stars and set it among the constellations at Apollo's command and Jupiter's — Apollo's because Orpheus honored him especially, Jupiter's because he had shown kindness to his daughter.
     — translation RTMacfarlane


     Hyginus, Poetica Astronomica, 2.7.1

Lyra inter sidera constituta est hac, ut Eratosthenes ait, de causa, quod initio a Mercurio facta de testudine, Orpheo est tradita, qui, Calliopes et Oeagri filius, eius rei maxime studiosus fuit. Itaque existimatur suo artificio feras etiam ad se audiendum adlicuisse. Qui querens uxoris Eurydices mortem, ad inferos descendisse existimatur, et ibi deorum progeniem suo carmine laudasse, praeter Liberum patrem; hunc enim obliuione ductus praetermisit, ut Oeneus in sacrificio Dianam. Postea igitur Orpheus, ut complures dixerunt, in Olympo monte, qui Macedoniam diuidit a Thracia, sed ut Eratosthenes ait, in Pangaeo sedens, cum cantu delectaretur, dicitur ei Liber obiecisse Bacchas, quae corpus eius discerperent interfecti. Sed alii dicunt, quod initia Liberi sit speculatus, id ei accidisse. Musas autem collecta membra sepulturae mandasse, et lyram, quo maxime potuerant beneficio, illius memoriae causa figuratam stellis inter sidera constituisse Apollinis et Iouis uoluntate, quod Orpheus Apollinem maxime laudaret; Iuppiter autem filiae beneficium concessit.