Dear Colleagues- The MACHO project has detected a candidate microlensing event in progress towards the Galactic bulge. Event 99-BLG-45 Star ID 108.19602.2404 RA (J2000) 18:01:59.2 DEC (J2000) -27:56:33 V ~19.6 R ~18.6 A ~1.8 and rising on 22 Jul, expected peak near 19 Aug, duration 85 +/- 14 days. Finding charts and lightcurves are available on the web page at http://darkstar.astro.washington.edu or ftp site darkstar.astro.washington.edu directories macho/Alert/99-*. If you wish to no longer receive these bulletins please notify us at macho@astro.washington.edu.