Boratyński, K.L. 1951a Ordinary Meeting. Wednesday, 6th June, 1951, at 5:30 p.m.. Proceedings of the Royal Entomological Society of London, Series C: Jour. Mtgs. 15(5): 28-29.

Notes: Microscope slides of early stages of Matsucoccus pini and Steingelia gorodetskia are shown and discussed at this meeting.