The concept of Yezonychus Ehara is revised. Yezonychus cornus (Pritchard &
Baker) comb. nov. is restricted to mites from Elaeocarpus dentatus in New Z
ealand. Yezonychus falsicornus sp. nov. infesting Rubus spp., Dysoxylum spe
ctabile, and Weinmannia racemosa, and Yezonychus brevipilus sp. nov. infest
ing Leionema nudum, are described from New Zealand. A key to known species
of Yezonychus is given. Data on the biology of the species are included. Tr
ibolonychus collyerae gen. et sp. nov. is described from Nothofagus sp. in
New Zealand.