Robinson 1961. The parasites of the Psyllidae-2. Parapsyllaephagus adulticolus gen. et sp. nov., the first Hymenopterous parasite of an adult Psyllid (Homoptera). 3. Some notes on the biology and host relationships of Parapsyllaephagus adulticolus Robinson (H Annals & Magazine of Natural History Series 13, 4 1961: 117-121