The males can be up to 4cm long. They have been recorded as preying on insects in 11 different families (Lavigne, 1980). It is pleasing to note that prey includes the European Honey Bee.
Classification
from Australian Faunal Directory
Order Diptera - Flies, 8955 named species in Australia at Nov. 2021
Suborder Brachycera - Flies having short or few-segmented Antennae ending in a style
Family Asilidae - Robber Flies, 383 named species in Australia
Genus Neoaratus
Species Neoaratus hercules