Cockerell, T.D.A., & Parrott, P.J. 1899 Contribution to the knowledge of the Coccidae.. The Industrialist 25: 159-165, 227-237.

Notes: Key to 12 species of Lecanium with rudimentary legs, including L. sonorensis, n. sp.; key to 14 species of Saissetia, including S. tolucanium n. sp.; Gymnococcus ruber n. sp.; discussion of status of Cryptes baccatus.