Wille, J.E. 1932 Viaje del Dr. J. Wille a Huanuco, para establecer una colonia de Novius cardinali. [Dr. J. Wille's trip to Huanuco to establish a colony of Novius cardinali].. Boletín de la Dirección de Agricultura Ganadería y Colonización. Peru 2: 158-160.

Notes: Novius cardinalis imported to control Icerya purchasi; the establishment seems to have been successful, and N. cardinalis consumed a great number of this scale.