Marlatt, C.L. 1921a Pests collected from imported plants and plant products from January 1, 1921, to December 31, 1921, inclusive.. Annual Letter of Information (Federal Horticultural Board, United States Department of Agriculture) No. 35: 1-36.
Notes: Species listed include Aspidiotus lataniae, Chrysomphalus dictyospermi, Hemichionaspis minor, Howardia sp., Ischnaspis longirostris, Lepidosaphes gloverii, Pseudococcus adonidum and Pulvinaria sp.