%0 Journal Article %T Finite $p$-groups with a minimal non-abelian subgroup of index $p$ (IV) %A Lijian An %A Ruifang Hu %A Qinhai Zhang %J Mathematics %D 2013 %I arXiv %R 10.1142/s0219498814500327 %X In this paper, we completely classify the finite $p$-groups $G$ such that $\Phi(G')G_3\le C_p^2$, $\Phi(G')G_3\le Z(G)$ and $G/\Phi(G')G_3$ is minimal non-abelian. This paper is a part of the classification of finite $p$-groups with a minimal non-abelian subgroup of index $p$. Together with other four papers, we solve a problem proposed by Y. Berkovich. %U http://arxiv.org/abs/1310.5503v2