Krause, G. 1951 [Identification of the San-José scale insect and other cover scale insects on domestic and imported fruits.] Versuche über die aktive Ausbreitung der San-José-Schildlaus (Quadraspidiotus perniciosus [Comst.]).. Zeitschrift für Pflanzenbrau und Pflanzenschutz 6: 271-283.

Notes: Descriptions are provided of this species including males found on domestic and imported fruits.