  The paper includes novel results for the scattering and localisation of a
time-harmonic flexural wave by a semi-infinite herringbone waveguide of rigid
pins embedded within an elastic Kirchhoff plate. The analytical model takes
into account the orientation and spacing of the constituent parts of the
herringbone system, and incorporates dipole approximations for the case of
closely spaced pins. Illustrative examples are provided, together with the
predictive theoretical analysis of the localised waveforms.
