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We present an abundance analysis based on high dispersion and highsignal-to-noise ratio Keck spectra of a very highly microlensed Galactic bulgedwarf, OGLE-2007-BLG-349S, with Teff ~ 5400 K. The amplification at the timethe spectra were taken ranged from 350 to 450. This bulge star is highlyenhanced in metallicity with [Fe/H] = +0.51 \pm 0.09 dex. The abundance ratiosfor the 28 species of 26 elements for which features could be detected in thespectra are solar. In particular, there is no evidence for enhancement of anyof the alpha-elements including O and Mg. We conclude that the high [Fe/H] seenin this star, when combined with the equally high [Fe/H] derived in previousdetailed abundance analysis of two other Galactic bulge dwarfs, both alsomicrolensed, implies that the median metallicity in the Galactic bulge is veryhigh. We thus infer that many previous estimates of the metallicitydistribution in the Galactic bulge have substantially underestimated the meanFe-metallicity there due to sample bias, and suggest a candidate mechanism forsuch. If our conjecture proves valid, it may be necessary to update thecalibrations for the algorithms used by many groups to interpret spectra andbroad band photometry of the integrated light of very metal-rich old stellarpopulations, including luminous elliptical galaxies.

Clues to the Metallicity Distribution in the Galactic Bulge: Abundances in OGLE-2007_BLG-349S