At least 2 types of poison are known to be injected by its tail stinger: hemotoxin & neurotoxin
[DOC] [TLE] Guide to Belize Dangerous Creatures on Land and in the Water [PAR] To compensate for their size, nature has given many small animals weapons 
such as ... Paraponera, the so-called bullet ant (P. clavata), named on account of 
its ... use a chewing motion to inject appropriate amounts of strong neurotoxic 
venom.