Winged male ant, Myrmica americana, from Iowa. In social insects like ants and termites, winged individuals are known as alates. Armed with the power of flight, these individuals are responsible for dispersing to new territory and founding new colonies.
Velvet ant, family Mutillidae, from Costa Rica. This 'ant' is actually an ectoparasitoid wasp; females lay their eggs in the nest of a ground-dwelling insect, typically a solitary wasp or bee, which hatch and consume the larvae or pupae within. They are renowned for their painful sting.
Scoliid wasp (Scoliidae, most likely Campsomeris sp.) from Chiang Mai, Thailand. This family of wasps exclusively parasitize scarab beetle larvae.