It lists pain on a scale from one to four and unsurprisingly the bullet ant tops the charts.
- Level 4: bullet ant, tarantula hawk wasp
- Level 3: paper wasp, harvester ant
- Level 2: honey bee, yellow jacket wasp, bald-faced hornet
- Level 1.5: bullhorn acacia ant
- Level 1: fire ant, sweat bee
http://www.bbc.com/earth/story/20150312-the-worlds-most-painful-insect-sting?ocid=socialflow_facebook