Oleg P. Negrobov

Two new species of Medetera Fischer von Waldheim (Diptera, Dolichopodidae) from Russia and Mongolia.

Two new species Medetera sakhalinensis Negrobov & Naglis sp. nov. from Russian Far East (Sakhalin) and M. emeljanovi Negrobov & Naglis sp. nov. from Mongolia are described and differential diagnosis are given.

New data on the systematics of the species of the Dolichopus sublimbatus Becker group (Diptera, Dolichopodidae)

The holotype of the species Dolichopus sublimbatus Becker, 1917 is redescribed. Illustrations of the hypopygium of this species are given for the first time. A new species, Dolichopus kuznetsovi sp. n., is described from Primorskii Territory. A key to the species of the Dolichopus sublimbatus group is given.

New data on the systematics of the palaearctic species of the Dolichopus signifier group (Diptera, Dolichopodidae)

Three new species of the genus Dolichopus Latr. (Diptera, Dolichopodidae) are described. All these species are closely related to Dolichopus signifer Haliday, 1832 and form a species-group including this species. Dolichopus taimyricus sp. n. is described from the southern tundra of the Taimyr Peninsula (northern Central Siberia); D. zlobini sp. n. was collected in the Pamirs (Tajikistan) and D. asymmetricus sp. n., in the mountains of Kazakhstan, Tajikistan, and Uzbekistan. A key to all these species of the group is given.

Russian fauna of the genus Chrysotus (Diptera, Dolichopodidae): Part 1. Chrysotus cilipes Meigen and Ch. laesus Wied. species-Group

Based on examination of the collections of the Zoological Institute of the Russian Academy of Sciences and Voronezh State University, a list of species of the group Chrysotus cilipes Meigen and Ch. laesus Wied. was compiled for the fauna of Russia, including 8 species: Chrysotus amurensis Negrobov, Ch. caerulescens Negrobov, Ch. cilipes Meigen, Ch. laesus (Wiedemann), Ch. parilis Parent, Ch. pennatus Lichtwardt, Ch. pseudocilipes Hollis, and Ch. suavis Loew.

New species of the genus Dolichopus (Diptera, Dolichopodidae) from the mountains of the Altai and Tuva

Two new species from the mountains of Altai and Tuva, Dolichopus fursovi Negrobov et Barkalov sp. n. similar to D. grunini Smirnov and D. selivanovae Negrobov et Barkalov, sp. n. similar to D. reichardti Stackelberg, are described.

A review of species of the genus Diaphorus (Diptera, Dolichopodidae) in the Palaearctic Region

The history of studying the genus Diaphorus is described. Seventeen species have been studied. A key to species of the genus Diaphorus of the Palaearctic fauna, including 37 species, and a catalogue of the Palaearctic species with synonyms are given. Diaphorus oldenbergi Parent, 1925 is regarded as a synonym of the species D. nigrotibia Strobl, 1893 (syn. n.). The new species Diaphorus sublautus sp. n. from Azerbaijan is described. Lectotypes of D. dolichocercus Stackelberg, D. parenti Stackelberg, D. ussuriensis Stackelberg, and D. varifrons Becker are designated.

The First Record of the Genus Nepalomyia Hollis (Diptera, Dolichopodidae) for the Western Part of the Palaearctic Region

The distribution of the species of Nepalomyia Hollis, 1964 over the principal zoogeographical regions is briefly summarized. A new species, Nepalomyia chalajaesp. n. from the North Caucasus, is described. The replacement name Nepalomyia igorinom. n. is proposed for the homonym Nepalomyia yangi Grootaert, 2013, nec Wang, Yang and Grootaert, 2007. A key to males of the ten Palaearctic species of Nepalomyia is given.

Phylogenetic Signal in the Wing Shape in the Subfamily Dolichopodinae (Diptera, Dolichopodidae)

Interspecific and sex-related variations in the wing shape of 22 species of the fly subfamily Dolichopodinae, family Dolichopodidae were analyzed using geometric morphometrics. Mapping morphometric traits onto phylogeny revealed a clear phylogenetic signal in the interspecific variation and sexual dimorphism of wing shape. In some cases, not too closely related species occupied the same portion of the morphometric space, indicating some degree of homoplasy. Interspecific variation was associated with an increased wing area due to both elongation and widening or only elongation of the wing. An increase in wing area was accompanied by extension of the posterior crossvein to the apical part of the wing. The variation in wing shape related to sexual dimorphism involved the same structures (the posterior crossvein and the apical part of CuA1), but variation associated with sexual dimorphism was distributed in fewer dimensions than interspecific variation. The allometric component of sexual dimorphism varied between species, and in most cases it was not the leading factor in wing shape variability.

Review of East Palaearctic species of Sympycnus Loew, 1857, with a key to species

Four new species of Sympycnus Loew, 1857, S. ferganicus sp. nov., S. leleji sp. nov., S. stackelbergi sp. nov. and S. yakutensis sp. nov. from Russia (Yakutia), Kazakhstan, Kyrgyzstan, Tajikistan and Uzbekistan are described. Sympycnus convergens Negrobov, 1973 and S. urgaicus Negrobov, 1973 are placed in synonymy with S. changaicus Negrobov (syn. nov.). Lectotype and paralectotypes are designated for Sympycnus simplicipes Becker, 1908. A checklist of the East Palaearctic species of the genus is compiled and a key to males of the 14 species is provided. Five species groups are defined. New data on the distribution of known species are presented. The known distribution of East Palaearctic Sympycnus species is briefly discussed.

New species of Hercostomus Loew, 1857 (Dolichopodidae, Diptera) from Japan

Six new species of the genus Hercostomus Loew, 1857, are described from Japan: Hercostomus acutiformis Negrobov, Kumazawa & Tago sp. nov., H. falcilis Negrobov, Kumazawa & Tago sp. nov., H. flavipalpus Negrobov, Kumazawa, Tago & Sato sp. nov., H. nigricollaris Negrobov, Kumazawa & Tago sp. nov., H. spathulatus Negrobov, Kumazawa, Tago & Sato sp. nov., H. spinitibialis Negrobov, Kumazawa & Tago sp. nov. Hercostomus flaveolus Negrobov & Chalaya, 1987 is newly recorded from Japan, and Hercostomus arcticus Yang, 1996 is newly synonymized with Hercostomus flaveolus (syn. nov.). The holotype of Hercostomus flaviventris Smirnov & Negrobov, 1979 is redescribed. Hercostomus ussurianus Stackelberg is transferred to the genus Gymnopternus Loew, 1857 (stat. nov.). A key to the eleven recognized species of Japanese Hercostomus is provided.