Among the treasures of my harmas-laboratory, I place in the first rank an Ant-hill of Polyergus rufescens, the celebrated Red Ant, the slave-hunting Amazon.    From Wordnik.com.  [The Mason-Bees] Reference

Polyergus - Slave-Raiding Ant. Illinois, USA. filename: PolyergusIL4.    From Wordnik.com.  [WordPress.com News] Reference

Polyergus rufescens (see Red Ant).    From Wordnik.com.  [The Mason-Bees] Reference