  The B0.2 V magnetic star tau Sco stands out from the larger population of
massive OB stars due to its high X-ray activity, peculiar wind diagnostics and
complex magnetic field. Recently, Petit et al. 2011 presented the discovery of
the first two tau Sco analogues -- HD 66665 and HD 63425, identified by the
striking similarity of their UV spectra to that of tau Sco. ESPaDOnS and Narval
spectropolarimetric observations were obtained by the Magnetism in Massive
Stars CFHT and TBL Large Programs, in order to characterize the stellar and
magnetic properties of these stars. A magnetic field of similar surface
strength was found on both stars, reinforcing the connection between the
presence of a magnetic field and wind peculiarities. We present additional
phase-resolved observations secured by the MiMeS collaboration for HD 66665 in
order to measure its magnetic geometry, and correlate that geometry with
diagnostics of mass-loss.
