  We present STAR measurements of the azimuthal anisotropy parameter $v_2$ for
pions, kaons, protons, $\Lambda$, $\bar{\Lambda}$, $\Xi+\bar{\Xi}$, and $\Omega
+ \bar{\Omega}$, along with $v_4$ for pions, kaons, protons, and $\Lambda +
\bar{\Lambda}$ at mid-rapidity for Au+Au collisions at $\sqrt{s_{_{NN}}}=62.4$
and 200 GeV. The $v_2(p_T)$ values for all hadron species at 62.4 GeV are
similar to those observed in 130 and 200 GeV collisions. For observed kinematic
ranges, $v_2$ values at 62.4, 130, and 200 GeV are as little as 10%--15% larger
than those in Pb+Pb collisions at $\sqrt{s_{_{NN}}}=17.3$ GeV. At intermediate
transverse momentum ($p_T$ from 1.5--5 GeV/c), the 62.4 GeV $v_2(p_T)$ and
$v_4(p_T)$ values are consistent with the quark-number scaling first observed
at 200 GeV. A four-particle cumulant analysis is used to assess the non-flow
contributions to pions and protons and some indications are found for a smaller
non-flow contribution to protons than pions. Baryon $v_2$ is larger than
anti-baryon $v_2$ at 62.4 and 200 GeV perhaps indicating either that the
initial spatial net-baryon distribution is anisotropic, that the mechanism
leading to transport of baryon number from beam- to mid-rapidity enhances
$v_2$, or that anti-baryon and baryon annihilation is larger in the in-plane
direction.
