Hille Ris Lambers. 1949. Contributions to a monograph of the Aphididae of Europe IV. The genera Aulacorthum Mordv. , 1914; Microlophium Mordv. , 1914; Hyalopteroides Theob. , 1916; Idiopterus Davis, 1909; Pentalonia Coquerel, 1859; Amphorophora Buckton, 1
