  We consider identical particle and lepton mass effects in the cascade decay
$H\to Z^\ast(\to\tau^+\tau^-)+Z^\ast(\to\tau^+\tau^-)$. Since the scale of the
problem is set by the off-shellness $p_a^2$ and $p_b^2$ of the respective gauge
bosons in the limits ($4m_\tau^2\le p_a^2,p_b^2\le (m_H-2m_\tau)^2$) and not by
$m_H^2$, lepton mass effects are nonnegligible in particular close to the
threshold of the off-shell decays. We calculate the rates and single angle
decay distributions and compare them with the corresponding rates and single
angle decay distributions for the nonidentical particle decays $H\to Z^\ast(\to
e^+e^-)+Z^\ast(\to\mu^+\mu^-)$ involving negligible lepton masses.
