Резюме. Приведены иллюстрированные описания с российского Дальнего Востока двух новых для науки видов-Eukiefferiella captiosa sp.n. по трём стадиям развития и E. bykova sp.n. по имаго самцу и куколке. Впервые описаны куколка и личинка для E. convexa Makarchenko et Makarchenko, а также дано переописание куколки E. devonica (Edwards), указанного впервые для российского Дальнего Востока и краткое описание неопределенной куколки Eukiefferiella sp., которая наиболее близка виду E. ilkleyensis Edwards. Для всех видов сделаны таксономические замечания со сравнительной характеристикой для близкородственных видов и уточнено распространение.

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Chironomids of the subgenus Chaetocladius s. str. from the Amur River basin are revised using both morphological characters and molecular data. Three new species, C. egorych sp. nov., C. lopatinskiy sp. nov. and C. yavorskayae sp. nov., are described and figured. The pupa of C. fedotkin is described for the first time. Adult males of C. ligni and C. piger, little-known in the Far East, are redescribed and annotated, and key to males of the Chaetocladius s. str. from the Amur River basin is provided. A reference 658 bp barcode sequence from a fragment of the mitochondrial gene cytochrome oxidase I (COI) was used as a tool for species delimitation. Comparisons with corresponding regions of COI between 5 species in the subgenus produced K2P genetic distances of 8.3-12.6%, values well associated with interspecific variation. Molecular data were also used for the reconstruction of the phylogenetic relationships within the subgenus Chaetocladius s. str.

Illustrated descriptions of adult male, pupa and fourth instar larva, as well as DNA barcoding results of Hydrobaenus golovinensis sp. nov. in comparison with closely related species H. majus Makarchenko et Makarchenko and H. sikhotealinensis Makarchenko et Makarchenko from the Russian Far East are provided. Partial mitochondrial COI gene (DNA barcoding) of the new species has been sequenced and uploaded to GenBank. Comparisons with corresponding regions of COI between H. golovinensis and other species in the genus produce K2P genetic distances of 10.3–14.3%, the values well above those associated with intraspecific variation. In contrast, genetic distances among 18 specimens are all within the range of 0–3.5%. The ML tree is also constructed using DNA barcodes obtained in the present study and those of other species of Hydrobaenus Fries from GenBank.

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Резюме. Приведён обзор хирономид рода Gymnometriocnemus (Edwards) российского Дальнего Востока с иллюстрированными переописаниями имаго самцов G. (G.) subnudus (Edwards), G. (R.) brumalis (Edwards), G. (R.) kamimegavirgus Sasa et Hirabayashi и G. (R.) tairaprimus Sasa et Okazawa, из которых два последних вида впервые обнаружены в России. Отмечено высокое морфологическое сходство комаров видов этого рода, уточнено их распространение и даны таксономические комментарии. Составлена определительная таблица для имаго самцов дальневосточных видов.

Three new species of the genus Parorthocladius Thienemann, P. lazovskiensis sp. nov., P. plolabius sp. nov., and P. tyurkini sp. nov. from the Russian Far East are described and figured. Descriptions of pupae and larvae of one indeterminate species, Parorthocladius sp. 1, are also presented. Keys to determination of adult males, pupae and fourth instar larvae of Far-Eastern species Parorthocladius are provided.