Hille Ris Lambers. 1947. Contributions to a monograph of the Aphididae of Europe III. The genera Pharalis Leach, 1826; Microsiphum Chol. , 1902; Anthracosiphon nov. gen. ; Delphiniobium Mordv. , 1914; Corylobium Mordv. , 1914; Acyrthosiphon Mordv. , 1914;
