Dear Colleagues- The MACHO project has detected a candidate microlensing event in progress towards the Galactic bulge. Event 99-BLG-37 Star ID 103.24161.2085 RA (J2000) 18:12:45.9 DEC (J2000) -27:20:04 V ~19.1 R ~18.6 A ~2.0 and rising on 11 Jun, expected peak near 6 Jul, duration 84 +/- 26 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.