Template:Felt, 1921e
- Felt, E.P. 1921. Appendix: A study of gall midges, VII. Pp. 81–240: 255–280, pls. 8–20. In his 34th Report of the State Entomologist on injurious and other insects of the State of New York 1918. New York State Museum Bulletin 7–288, 20 pls. BHL