|Milesia crabroniformis. Male, frontal view|
|Female, dorsal view|
The adults of Milesia crabroniformis grow up to 22–25 millimetres (0.87–0.98 in) long. These rather uncommon hoverflies are the largest among the European species.
They show a yellow face, reddish femurs, a yellow-brown abdomen and its wings are shaded with yellow-orange. Eyes of males are holoptic, although they meet along the dorsal length of the head in a very low point of contact.
Adults can mainly be encountered from June through October, with a peak at the end of August. They inhabit evergreen and deciduous forests (Quercus and Fagus species), feeding on nectar of flowers of several plants (Apiaceae species, Lythrum salicaria, Mentha aquatica, Sambucus ebulus, Hedera species, Cirsium species, etc.). 
|Wikispecies has information related to Milesia crabroniformis|
- Van Veen M. P. - Hoverflies of Northwest Europe, Identification Keys to the Syrphidae, 2004 - Utrecht KNNV Publishing, page 145
|Wikimedia Commons has media related to Milesia crabroniformis.|