These are the worst stings in the world, according to a guy who's experienced them all

Schmidt, a budding entomologist, had just returned to the University of Georgia from a trip around the country with his zoologist wife.

They'd been collecting different species of harvester ants —"nasty stinging insects whose venom chemistry was unknown," as he describes them in his fascinating book, "The Sting of the Wild."

To learn the details of the venom for his dissertation on the chemistry of harvester stings, they had to analyze large numbers of the creatures, which meant getting up close and personal with them.

Debbie, Schmidt's wife, describes her first harvester sting in the book as a "deep ripping and tearing pain, as if someone were reaching below the skin and ripping muscles and tendons; except the ripping continued with each crescendo of pain."

After collecting buckets of the creatures, the plan was to analyze them and compare the venoms from different specimens. To assess venom, Schmidt needed to evaluate both toxicity and pain. Toxicity was straightforward — existing measures could be used. But the pain scale had to be created.

Thus was born the "Schmidt Pain Scale for Stinging Insects." It's a four-point system, with a four being most painful. The scale is anchored by the well-known sting of a honey bee (rating a two) something people all over the world could be familiar with. To go up or down a full point, a sting has to be discernably more or less painful than the stings on another level. Half points can be used for pricks that fall somewhere between levels.

Over the years, Schmidt added new species to the list. He mostly didn't try to get stung. It just happened, more than 1,000 times, from at least 83 different species that have been evaluated on the index.

We've picked out insects that will illustrate the full scope of the scale, including a few that demonstrate the worst of the worst:

Red fire ant

Scientific name: Solenopsis invicta

Range: Native to South America

Description: "Sharp, sudden, mildly alarming. Like walking across a shag carpet and reaching for the light switch."

Pain level: 1

Western cicada killer

Scientific name: Sphecius grandis

Range: North America

Description: "Pain at first sight. Like poison oak, the more your rub, the worse it gets."

Pain level: 1.5

Western honey bee

Scientific name: Apis mellifera

Range: Native to Africa and Europe

Description: "Burning, corrosive, but you can handle it. A flaming match head lands on your arm and is quenched first with lye and then sulfuric acid."

Pain level: 2 (In the special case that you get stung on the tongue, that level rises to a 3 — "It's crawled into your soda can and stings you on the tongue. It's immediate, noisome, visceral, debilitating. For 10 minutes life is not worth living.")

Western yellowjacket

Scientific name: Vespula pensylvanica

Range: North America

Description: "Hot and smoky, almost irreverent. Imagine W.C. Fields extinguishing a cigar on your tongue."

Pain level: 2

Golden paper wasp

Scientific name: Polistes aurifer

Range: North America and Central America

Description: "Sharp, piercing, and immediate. You know what cattle feel when they are branded."

Pain level: 2.5

Fierce black polybia wasp

Scientific name: Polybia simillima

Range: Central America

Description: "A ritual gone wrong, satanic. The gas lamp in the old church explodes in your face when you light it."

Pain level: 2.5

Velvet ant (technically a wasp)

Scientific name: Dasymutilla klugii

Range: North America

Description: "Explosive and long lasting, you sound insane as you scream. Hot oil from the deep frying spilling over your entire hand."

Pain level: 3

Florida harvester ant

Scientific name: Pogonomyrmex badius

Range: North America

Description: "Bold and unrelenting. Somebody is using a power drill to excavate your ingrown toenail."

Pain level: 3

Maricopa harvester ant

Scientific name: Pogonomyrmex maricopa

Range: North America

Description: "After eight unrelenting hours of drilling into that ingrown toenail, you find the drill is wedged in the toe."

Pain level: 3

Tarantula hawk

Scientific name: Pepsis spp.

Range: North America, Central America, and South America

Description: "Blinding, fierce, shockingly electric. A running hair dryer has just been dropped into your bubble bath."

Pain level: 4

Bullet ant

Scientific name: Paraponera clavata

Range: Central America and South America

Description: "Pure, intense, brilliant pain. Like walking over a flaming charcoal with a 3-inch nail embedded in your heel."

Pain level: 4

Warrior (or armadillo) wasp

Scientific name: Synoeca septentrionalis

Range: Central America and South America

Description: "Torture. You are chained in the flow of an active volcano. Why did I start this list?"

Pain level: 4

These are the worst stings in the world, according to a guy who's experienced them all

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