  The resistivity in metals near an antiferromagnetic quantum critical point
(QCP) is strongly affected by small amounts of disorder. In a quasi-classical
treatment, we show that an interplay of strongly anisotropic scattering due to
spin fluctuations and isotropic impurity scattering leads to a large regime
where the resistivity varies as T^alpha, with an anomalous exponent, alpha, 1
<= alpha <= 1.5, depending on the amount of disorder. I argue that this
mechanism explains in some detail the anomalous temperature dependence of the
resistivity observed in CePd_2Si_2, CeNi_2Ge_2 and CeIn_3 near the QCP.
