Morrison, Harold and Morrison, Emily. 1923. The scale insects of the subfamilies Monophlebinae and Margarodinae treated by Maskell. Proceedings of the United States National Museum, 62(2463): 1-47, 19 figs., 3 pls.. doi:10.5479/si.00963801.62-2463.1
Morrison, Harold and Morrison, Emily. 1927. The Maskell species of scale insects of the subfamily Asterolecaniinae. Proceedings of the United States National Museum, 71(2689): 1-67, 29 pls.. doi:10.5479/si.00963801.71-2689.1
Morrison, Harold and Morrison, Emily. 1922. A redescription of the type species of the genera of Coccidae based on species originally described by Maskell. Proceedings of the United States National Museum, 60(2407): 1-120, 37 figs., 6 pls.. doi:10.5479/si.00963801.60-2407.1
Morrison, Harold. 1917. Monograph of the Nearctic Hymenoptera of the genus Bracon Fabriciun. Proceedings of the United States National Museum, 52(2178): 305-343, 4 pls.. doi:10.5479/si.00963801.52-2178.305
Morrison, Harold. 1923. A report on a collection of Coccidae from Argentine. II (Heniiptera Coccidae). Proceedings of the Entomological Society of Washington, 25(5-6): 122-126.