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The subgenus Euandrena of the genus Andrena from eastern Asia is revised and 14 species are recognized. Six new species, A. (Euandrena) sichuana n. sp., A. (Euandrena) communisella n. sp., A. (Euandrena) tomuerna n. sp., Andrena (Euandrena) carbointegra n. sp., A. (Euandrena) subruficrus n. sp., and A. (Euandrena) yamagishii n. sp. are described, Andrena (Euandrena) tateyamana Tamasawa et Hirashima, A. (Euandrena) bicolor Fabricius and A. (Euandrena) ruficrus rabicrus Hirashima are recorded from China for the first time. A key to East Asian females of Euandrena is given.

The subgenus Taeniandrena of the genus Andrena of eastern Asia is revised, and 12 species are recorded. Three new species, Andrena (Taeniandrena) matasequoiae, A. (T.) xuanzangi and A. (T.) steini are described from China. Andrena similis Smith is firstly recorded from East Asia. Five species also occur in Europe. A key to species to Taeniandrena in eastern Asia is given.

The subgenus Cnemidandrena of the genus Andrena of eastern Asia os revised, and 14 species, two of them are divided to two subspecies respectively, are recognized. Six new species, Andrena (Chemidandrena) gobi, A. (Cnem.) hedini, A. (Cnem.) gusenleitneri, A. (Chem.) granulitergorum, A. (Cnem.) gigantimurus, and A. (Cnem.) solidago are described from China and Japan. A key to species of Cnemidandrena in eastern Asia is given.

The subgenus Cholorandrena of the genus Andrena of eastern Asia is revised, and eight species are recongnized. Two new species, Andrena (Chlorandrena) talina and A. (Chl). yunnanica are described from China. A key to species of Chlorandrena in eastern Asia in given.

A newspecies, Andrena (Simandrena) metuoensis is described from Tibet, southwest China. The mole od A. (Simandrena) tiansaanaTadauchi et Xu is described for the first time and A. (Simandrena) nippon Tadauchi et Hirashima is newly recorded from China.

The subgenus Oreomelissa of the genus Andrena is revised, and 11 species and 2 subspecies are recognized. Three of them, Andrenafani, A.gangcana and A. flavolateralis are new to science, 2 homonymies, Andrena (Oreomelissa) montana Wu and A (Oreomelissa) nigra Wu are nominated as new names, A. (Oreomelissa) setosifemoralis Wu and A. (Oreomelissa) nigricula Wu, respectively. Four species, A. kamikichiana, A. coitana, A amurensis and A. mitakensis are newly recorded from China. A key to East Asian species of this subgenus is presented.

Ten species of the genus Andrena described by Cockerell from Siberia are examined. Seven species/subspecies are redescribed and given their subgeneric positions for the first time. One new synonymy and 2 new status are recognized as follows: Andrena epimelaena Cockerell = A. denticulata (Kirby); A. brassicae Hirashima = A. semirugosa brassicae; A. baicalensis Cockerell = A. tarsata baicalensis .

East Asian species of the subgenus Tarsandrena of the genus Andrena are revised, and 6 species are recognized from China and Mongolia. Three new species, Andrena (Tarsandrena) truncatella, A. (Tarsandrena) niveimonticola, A. (Tarsandrena) shawanensisare described. Three species, A. ehnbergi Morawitz, A. tarsata baicalensis Cockerell and A. angarensis Cockerell are newly recorded from China.

Eight species of the genus Andrena described by E. Strand from China are examined. Six species, A. hoffmanni, luridiloma, subshawellu, tsingtuuica, subproximana, nasipolitu are redescribed and firstly given their subgeneric positions except nasipolitu, which is undetermined its subgeneric position. Four new synonymies are recognized as follows: Andrena phytophila Strand = A. nawai Cockerell; A. stellaria Hirashima = A. luridiloma Strand; A. taruxaci chikuzenensis Hirashima = A. taraxaci orienticola Strand; A. (Lepidandrena) stiloclypeata Wu = A. nasipolita Strand. The lectotype and paralectotypes of Andrena subshawella Strand are designated.

Thirteen species of the genus Andrena are recorded from the Cheju Island and 4 species from the Korean Peninsula. One new species. Andrena (Andrena) dolharubang is described from the Cheju Island. Two males of Andrena (Melandrena) koreana Hirashima and Andrena (Plastandrena) magnipunctata Kim et Kim are newly described and the female of Andrena (Oreomelissa) amurensis Friese is redescribed. Andrena (Lepidandrena) lebedevi Popov is recognized as a new synonym of Andrena chengtehensis Yasumatsu. Five species are newly recorded from Korea and 9 are from the Cheju Island. With the completion of this study, 52 Korean species of the genus Andrena are listed including records in the literature.

East Asian species of the subgenus Simandrena of the genus Andrena are revised and 10 species are recognized from China, Japan and Korea. Three new species, Andrena (Simandrena) tianshana, wuae and platydepressa are described from China. One new synonym, 1 new status and 2 new records are included. A key to species of the subgenus Simandrena in the Palaearctic region including 9 European and North African species is presented.

Osmia (Chalcosmia) imaii Hirashima is newly synonymized with Osmia (Chalcosmia) jacoti Cockerell described from China. Three species of the genus Osmia are recorded from Korea.