Professor Housman states (C.Q. IX, p. 33) that stella never is used to mean sidus, and for authors of the best age I believe he is right; at least I know of no examples except those which he convincingly explains away in the article quoted. There seem, however, to be instances of this usage perhaps as early as the age of the Antonines. Hyginus, fab. cxcv, says of Orion, ab Ioue in stellarum numenim est relatus, quam stellam Orionem uocant. Again, fab. ccxxiv, Crotos…in stellam Sagittarium. Hyginus, it is true, was a fool, and his book is crammed with mistakes, including astronomical blunders; thus, just after the last-quoted passage, and also in fab. cxxx, he names the star Arcturus when he means the constellation Arctophylax, or Bootes. But I cannot think him quite so grossly ignorant, since he was interested in star-myths, as not to know that Orion and Sagittarius are constellations. It may be, however, that the use of stella in these passages is due, not to Hyginus himself, but to the epitomators whose extracts from the original work are all that has come down to us. Of these gentry I can believe almost anything that implies false Latin or general ignorance.