Synanthedon culiciformis, known as the large red-belted clearwing, is a moth of the family Sesiidae. It is found in the Palearctic and Nearctic realms.
The wingspan is 23-. The length of the forewings is 12mm14mm. The moth flies from April to August depending on the location.
The larvae feed on various deciduous trees, especially birch but also alder.