Original: 1-22 Insects that attack aphids include predatory lady bugs (Coleoptera: Coccinellidae) (ladybirds in the UK), hoverfly larvae (Diptera: Syrphidae), parasitic wasps, aphid midge larvae, aphid lions, crab spiders and lacewings (Neuroptera: Chrysopidae).
Simplified: Important natural enemies include the predatory lady beetles (Coleoptera: Coccinellidae), hoverfly larvae (Diptera: Syrphidae), and lacewings (Neuroptera: Chrysopidae), and entomopathogenic fungi like Lecanicillium lecanii and the Entomophthorales.