Prior to this research, 47 genera and 124 eriophyoid mite species have been known to occur in Shaanxi Province, north-western China. We described and illustrated herein five new species collected in Shaanxi Province. They are Proartacriscathayensis sp. nov. on Carya cathayensis Sarg. (Juglandaceae), Acaphyllisa changqingiensa sp. nov. on Salix sp. L. (Sal-icaceae), Tegonotus albus sp. nov. on Cornus alba L. (Cornaceae), Phyllocoptruta japonica sp. nov. on Lonicera japonicaThunb. (Caprifoliaceae), Anthocoptes albosinensis sp. nov. on Betula albosinensis Burkill (Betulaceae). At the same time,one new eriophyoid mite record from China is provided, Rhinotergum schestovici Petanovic, 1988, rec. nov. on Betulaalbosinensis Burkill (Betulaceae). A list of eriophyoid mites from Shaanxi Province is provided. All the new species and new record described herein are vagrants on respective host plants.

The eriophyoid mite fauna (Acari: Eriophyoidea) of Gansu Province, northwestern China was studied and eighty species were reported herein, among which twelve are new to science. These species and their hosts are as follows: Setoptus koraiensis on Pinus koraiensis and P. thunbergii; Anothopoda hainanensis on Zanthoxylum sp. (Rutaceae); Cecidophyopsis persicae on Amygdalus persica and Cerasus pseudocerasus (Rosaceae); Cecidophyes bambusae on Bambusa sp. (Gramineae); Epicecidophyes meliosmanis sp. nov. on Meliosma sp. (Sabiaceae); Stenacis lanzhouensis on Salix babylonica (Salicaceae); Eriophyes distinguendus on Prunus salicina (Rosaceae); Eriophyes pyri on Pyrus sp. (Rosaceae); Eriophyes zhangyeensis on Salix sp. (Salicaceae); Aceria abalis on Artemisiae sp. (Compositae); Aceria chinensis on Armeniaca vulgaris (Rosaceae); Aceria dispar on Populus tomentosa and P. tremula (Salicaceae); Aceria milli on Triticum sp. and Panicum miliaceum (Gramineae); Aceria paramacrodonis on Lycium sp. (Solanaceae); Aceria paratulipae on Triticum sp. and Panicum miliaceum (Gramineae); Aceria qinghaiensis on Salix babylonica (Salicaceae); Aceria tosichella on Triticum sp. (Gramineae); Aceria tulipae on Tulipa sp. (Liliaceae); Acalitus phloeocoptes on Prunus sp. (Rosaceae); Acaphyllisa adamantis sp. nov. on Salix sp. (Salicaceae); Paracalacarus podocarpi on Podocarpus macrophyllus and Podocarpus nagi (Podocarpaceae); Tegonotus platycaryanis sp. nov. on Platycarya strobilacea (Juglandaceae); Calepitrimerus bungeanus on Euonymus maackii (Celastraceae); Calepitrimerus clematisis sp. nov. on Clematis sp. (Ranunculaceae); Calepitrimerus guanegounis sp. nov. on Lindera rubronervia (Lauraceae); Calepitrimerus linderanis sp. nov. on Lindera sp. (Lauraceae); Calepitrimerus oxytropis on Oxytropis ochrantha (Leguminosae); Caleptrimerus sabinae on Sabina chinensis (Cupressaceae); Epitrimerus amygdali on Amygdalus triloba (Rosaceae); Epitrimerus argyris on Artemisia argyri (Compositae); Epitrimerus armeniacae on Prunus armeniaca (Rosaceae); Epitrimerus integrae on Salix integra (Salicaceae); Epitrimerus lonicerae on Lonicera sp. (Caprifoliaceae); Epitrimerus sabinae on Sabina chinensis cv. Kaizuca (Cupressaceae); Phyllocoptruta sorbarianis sp. nov. on Sorbaria kirilowii (Rosaceae); Phyllocoptruta spiraeanis sp. nov. on Spiraea blumei (Rosaceae); Phyllocoptes dangchangi on Picea asperata (Pinaceae); Phyllocoptes japonicae on Lonicera japonica (Caprifoliaceae); Phyllocoptes gansuensis on Poteantilla glabra (Rosaceae); Phyllocoptes lonicerae on Lonicera caprifolium (Caprifoliaceae); Phyllocoptes lyciumi on Lycium chinense (Solanaceae); Phyllocoptes adalius on Rosa sp. (Rosaceae); Phyllocoptes taishanensis on Cedrus deodara (Pinaceae); Vittacus humuli on Humulus scandens (Moraceae); Aculus mononis sp. nov. on Acer mono (Aceraceae); Aculus niphocladae, Aculus salicis, and Aculus tetanothrix on Salix sp. (Salicaceae); Aculus schlechtendali on Malus pumila (Rosaceae); Aculops baligouis on Acer sp. (Aceraceae); Aculops jambosae on Syzygium aromaticum (L.) (Myrtaceae); Aculops pelekassi (Keifer), 1959, on Citrus sp. and Zanthoxylum bungeanum (Rutaceae); Aculops salixis on Salix sp. (Salicaceae); Aculops saussureae on Saussurea polycephala (Asteraceae); Aculops syringae on Syringa oblata (Oleaceae); Aculops wenxianensis on Melia azedarach (Meliaceae); Paratetra salicis on Salix sp. (Salicaceae); Tetra lucidi on Ligustrum lucidum (Oleaceae); Tetra polygonumnis sp. nov. on Polygonum sp. (Chenopodiaceae); Tetra populi on Populus sp. (Salicaceae); Tetra salixis on Salix babylonica (Salicaceae); Tetra shiheziensis on Populus sp. (Salicaceae); Tegolophus hunanensis on Vitex sp. (Verbenaceae); Tegolophus salicis on Salix sp. (Salicaceae); Tegolophus sophorae on Sophora japonica (Leguminosae); Diptilomiopus buxusis sp. nov. on Buxus sp. (Buxaceae); Diptacus mercuriasis on Mercurialis leiocarpa (Euphorbiaceae); Diptacus persicae on Prunus persica (Rosaceae); Diptacus platyphyllae on Betula platyphylla (Betulaceae); Diptacus serrulatis on Photinia serrulata (Rosaceae); Diptacus sorbusis on Sorbus sp. (Rosaceae); Diptacus wenisis on Viburnum sp. (Caprifoliaceae); Trimeroptes quercus on Quercus glauca (Fagaceae); Areekulus rhododendronis sp. nov. on Rhododendron sp. (Ericaceae); Rhyncaphytoptus fabris on Abies fabri (Pinaceae); Rhyncaphytoptus fargesis on Abies fargesii (Pinaceae); Rhyncaphytoptus guanegounis on Lonicera sp. (Caprifoliaceae); Rhyncaphytoptus potentillae on Pentaphylloides floribunda [Potentilla fruticosa] and Potentilla glabra (Rosaceae); Rhyncaphytoptus ulmi and Rhyncaphytoptus ulmivagrans on Ulmus sp. (Ulmaceae). A key to the eriophyoid mites in the province is also provided herein.

Up to now, 64 genera and 178 eriophyoid mite species are known to occur on the Fagaceae. We described and illustrated herein seven new genera and eleven new eriophyoid species associated with plants in the family Fagaceae, collected from eleven provinces in China. They are: Bariella spinishieldis sp. nov. on Quercus sp.; Calesalquia tiantangzhaica gen. nov. & sp. nov. on Quercus sp.; Acaphyllisa quinqueridges sp. nov. on Cyclobalanopsis glauca; Jiangsuacarus huaguoshanensis gen. nov. & sp. nov. on Quercus sp.; Spinacarus guniujiangensis gen. nov. & sp. nov. on Cyclobalanopsis glauca; Calvittacus chenius sp. nov. on Quercus chenii; Cereusacarus maopingensis gen. nov. & sp. nov. on Cyclobalanopsis glauca; Neovittacus shitaicus gen. nov. & sp. nov. on Quercus sp.; Paracaliphytoptus yangensis gen. nov. & sp. nov. on Cyclobalanopsis glauca; Shaanxicarus glaucaer gen. nov. & sp. nov. on Cyclobalanopsis glauca; and Rhyncaphytoptus qimenensis sp. nov. on Cyclobalanopsis glauca. An updated checklist and a key to the eriophyoid mite genera on the Fagaceae are provided. Three new combinations are given: Jiangsuacarus abietis (Kuang & Luo, 2005) comb. nov. on Abies fabri (Pinaceae); Jiangsuacarus dolichocladae (Song, Xue & Hong, 2008) comb. nov. on Bambusa dolichoclada (Poaceae); and Coptophylla querci (Chandrapatya & Boczek, 2000), comb. nov. on Quercus mespilifolioidea (Fagaceae).

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A new species of eriophyid mite from China, Vittacus humuli sp. nov. (Phyllocoptinae: Anthocoptini) collected from Japan Hop, Humulus scandens, is described and illustrated. This new species is vagrant on leaves. A key to world species of the genus Vittacus is provided.

Five new species in the tribe Anthocoptini of the Eriophyidae (Acari: Eriophyoidea) from China are described and illustrated. They are Vittacus shaoguanicus sp. nov. on Carmona retusa (Vahl) Masam. (Boraginaceae), Vittacus cornusis sp. nov. on Cornus officinalis Sieb. et Zucc. (Cornaceae), Aculops buddlejaes sp. nov. on Buddleja lindleyana Fort. (Buddlejaceae ), Aculodes tsukushiensis sp. nov. on Elymus tsukushiensis Honda var. transiens (Hack.) Osad (Poaceae) and Tegolophus spathaceae sp. nov. on Fargesia spathacea Franch. (Poaceae, Bambuseae). All the new species described herein are vagrants on the respective host plant.

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