LeBaron, W. 1872 The willow bark-louse (Mytilaspis salicis n. sp.). Annual Report, Noxious Insects of the State of Illinois 2: 140.
Notes: Mytilaspis salicis n. sp. [is Chionaspis salicis nigrae.] Also in Ill. State Hort. Soc. Trans. 1871: 140.
LeBaron, W. 1872 The willow bark-louse (Mytilaspis salicis n. sp.). Annual Report, Noxious Insects of the State of Illinois 2: 140.
Notes: Mytilaspis salicis n. sp. [is Chionaspis salicis nigrae.] Also in Ill. State Hort. Soc. Trans. 1871: 140.