Biology and Taxonomy of Two Gall Midges (Diptera: Cecidomyiidae) Found in Galls on Balsam Fir Needles with Description of a New Species of Paradiplosis

Eben A. Osgood, Raymond J. Gagné, Biology and Taxonomy of Two Gall Midges (Diptera: Cecidomyiidae) Found in Galls on Balsam Fir Needles with Description of a New Species of Paradiplosis, Annals of the Entomological Society of America, Volume 71, Issue 1, 16 January 1978, Pages 85–91, https://doi.org/10.1093/aesa/71.1.85