Heikinheimo, O. 2001: Semiaphis nolitangere Aizenberg, 1954 and differences
between the genera Semiaphis van der Goot, 1913 and Hyadaphis
Kirkaldy, 1904. - Entomol. Fennica 12: 39-43.
The life cycle and distribution of Semiaphis nolitangere Aizenberg are cleared, the alate sexupara and the sexual morphs are described, and the differences between the genera Hyadaphis Kirkaldy, 1904 and Semiaphis van der Goot, 1913 are discussed.