New Mira variables from the MACHO Galactic Bulge Fields

500 previously unrecorded Mira variables were found during an inspection of R-band lightcurves from the MACHO Galactic Bulge fields (http://macho.anu.edu.au/). Only objects with an amplitude >2mag (Rc) were taken into consideration. In addition, all lightcurves have been inspected visually; objects with significant changes in amplitude, mean magnitude and / or period suggesting semi-regularity have been rejected. Summary data for all new Mira variables and a statistical overview of the sample are given. Lightcurves, folded lightcurves and further details are available via AAVSO-VSX (http://www.aavso.org/vsx/).