Key to the Eriozona, Leucozona and Flavizona of the World
Well this has turned out to be a challenging group!
Here we have a cluster of genera that contain the Syrphine bumblebee mimics, and a bunch of things with white markings. They're cool, and not so common. In fact many of them are very obscure. A lot of this key is based on verbal descriptions alone - and sometimes not very detailed ones at that - so it needs to be treated with considerable care.
Species included:
Eriozona:
analis, nigroscutellata, syrphoides, tricolorata
Leucozona (Leucozona)
americana, brunetti, flavimarginata, inopinata, kingdonwardi, lucorum, nigripila, pruinosa, virendra
Leucozona (Ischyrosyrphus)
beybienkoi, glaucia, laternaria, sivae, transifasciatus, ussuriensis, velutina, xylotina
Flavizona
dolichostigma