Silver Spiny Queen Ant

Polyrhachis is a genus of formicine ants (family Formicidae, subfamily Formicinae) and is one of the largest and most diverse ant genera in the old world tropics. Polyrhachis species include an array of nesting types ranging from terrestrial, soil based nests to arboreal nests. Polyrhachis does not have a sting but with an acidipore can spray formic acid. When attacking, this is often sprayed in combination with biting thus making the acid more effective against the subject of the attack.