Hubbard, H.G., & Pergande, T. 1898 A new coccid on birch.. United States Department of Agriculture, Division of Entomology, Bulletin 18: 13-26.
Notes: Xylococcus betulae Pergande described and life history discussed.
Hubbard, H.G., & Pergande, T. 1898 A new coccid on birch.. United States Department of Agriculture, Division of Entomology, Bulletin 18: 13-26.
Notes: Xylococcus betulae Pergande described and life history discussed.