Yasnosh, V.A. 1968 [Species of the genus Physcus How. (Hymenoptera, Chalcidoidea) parasites of the scale insects in the U.S.S.R.]. Entomologicheskoe Obozrenye 45(1): 200-212.

Notes: Five new species of the genus Physcus from the Caucasus and central Asia are described: P. pistacicolus reared from Lepidosaphes pistacicola and P. luteolus reared from Quadraspidiotus slavonicus in Uzbekistan.