Musca Borealis was a constellation, now discarded, located between the constellations of Aries and Perseus. It was originally called Apes by Petrus Plancius when he created it in 1612. It was made up of a small group of stars, now called 33 Arietis, 35 Arietis, 39 Arietis, and 41 Arietis, in the north of the constellation of Aries.