Sap-inhabiting-larvae
Guides
Sphegina brachygaster
Thick-waisted Pufftail
Sphegina brachygaster, known as the Thick-waisted Pufftail, is a syrphid fly species described by Hull in 1935. It is fairly common in the eastern United States. Adults visit flowers for nectar and pollen. Larvae develop in decaying sap accumulations under bark in wet woodland environments.