All info here is from IFAS at links below.
Milkweed Assassin Bug
They are generalist predators feeding on a wide range of soft-bodied prey in garden and fields such as mosquitoes, flies, earthworms, cucumber beetles, and caterpillars (fall armyworm, rootworm, etc.).
Adult female milkweed assassin bug, Zelus longipes Linnaeus, on a sweet corn tassel
A mass of first instar nymphs of the milkweed assassin bug, Zelus longipes Linnaeus, hatching out of eggs laid on a sweet corn leaf
The wheel bug, Arilus cristatus (Linnaeus), is a moderately common, widely distributed, beneficial assassin bug that preys on pest insects. However, its bite can be more severe than a bee sting, and both nymphs and adults should be avoided or handled with caution.
Adult wheel bugs, mating
Adult wheel bug, Arilus cristatus (Linnaeus), feeding on a puss caterpillar,
Green Lace Wing’s larva eat soft-bodied garden pests, including caterpillars and aphids.
“Ground beetles” is the name of a large group of predatory beetles that are beneficial as both adults and larvae. They will eat a wide range of insects, including nematodes, caterpillars, thrips, weevils, slugs , and silverfish .
Soldier beetles are an important predator of Mexican bean beetles, Colorado potato beetles, caterpillars, and aphids.
Assassin bugs look like a strange mix between a praying mantis and a squash bug. They use their sharp mouthparts to prey upon many different types of insect pests in the garden.
ROBBER FLIES – With their extra-long legs, robber flies are bug-eating machines
Hoverfly looks like a tiny yellow jacket without a stinger. They feed on pollen and nectar and are extremely important pollinators. Their larvae are voracious predators, killing aphids , caterpillars, beetles, and thrips by sucking the juice from their victims.
Parasitic wasp eggs on a hornworm. Parasitic wasps are very tiny