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We generalize to elliptical models the argument of Kuijken (1997), whichconnects the microlensing optical depth towards the Galactic bulge to theGalactic rotation curve. When applied to the latest value from the MACHOcollaboration for the optical depth for microlensing of bulge sources, theargument implies that the Galactic bar cannot plausibly reconcile the measuredvalues of the optical depth, the rotation curve and the local mass density.Either there is a problem with the interpretation of the microlensing data, orour line of sight to the Galactic centre is highly atypical in that it passesthrough a massive structure that wraps only a small distance around theGalactic centre.Comment: Submitted to ApJ Letters. 8 pages LaTeX, 3 figures. Corrected error  in description of microlensing observation

Is Galactic Structure Compatible with Microlensing Data?