A few nice sting images I found:
Count my legs!
Image by macropoulos
Millipedes (class Diplopoda) are very elongated arthropods with cylindrical bodies that have two pairs of legs for each one of their 20 to 100 or more body segments. These animals are detritivores, they eat decaying leaves and other dead plant matter, moisturizing the food with secretions and then scraping it in with the jaws. They are slow and nonvenomous, unlike the somewhat similar and closely related centipedes (class Chilopoda), which have a single pair of legs for each body segment.
Due to their lack of speed and their inability to bite or sting, millipedes’ primary defense mechanism is to curl into a tight coil, protecting their delicate legs inside an armoured body exterior. Many species also emit a somewhat poisonous liquid secretion or hydrogen cyanide gas through microscopic pores along the sides of their bodies as a secondary defense. Some of these substances are acidic and can burn the exoskeleton of ants and other insect predators, and the skin and eyes of larger predators. Lemurs have been known to intentionally irritate millipedes in order to rub the chemicals on themselves to repel insect pests, and possibly to produce a psychoactive effect.
This class of arthropods is thought to be among the first animals to colonize land during the Silurian geologic period.
– Source: Wikipedia
Image by Miriam Bertoli
Image by miranda.granche