ISSN 0013-8738, Entomological Review, 2011, Vol. 91, No. 6, pp. 778–795. © Pleiades Publishing, Inc., 2011. Original Russian Text © E.P. Nartshuk, L.I. Fedoseeva, 2011, published in Entomologicheskoe Obozrenie, 2011, Vol. 90, No. 2, pp. 442–463. 778 A Review of Grassflies of the Genus Meromyza Meigen, 1830 (Diptera, Chloropidae) of the Palaearctic Fauna with a Key to Species, Analysis of the Synonymy, Host Specialization, and Geographic Distribution. Part 2 E. P. Nartshuk and L. I. Fedoseeva Zoological Institute, Russian Academy of Sciences, St. Petersburg, 199034 Russia Moscow State University, Moscow, Russia Received April 29, 2010 Abstract—The second part of the paper considers the position of the genus Meromyza Meigen, 1830 in the system of the family Chloropidae, its intrageneric classification, species synonymy, food plants, habitat preferences, geo- graphic distribution of its species, and the faunas of some regions in the Palaearctic. A list of literature is provided. DOI: 10.1134/S001387381106011X THE POSITION OF THE GENUS IN THE FAMILY AND ITS INTRAGENERIC TAXONOMY Genus Meromyza Meigen, 1830 Meigen, 1830 : 163. The position of the genus Meromyza in the family does not cause any division among specialists, who either include it into the group Platycephala (Anders- son, 1977; Kanmiya, 1983) or place it together with the African genus Archimeromyza Deeming into a separate subtribe Meromyzina of the tribe Platy- cephalini, which also includes the genera Meromyzella Andersson, 1977, Pachylophus Loew, 1858, Platy- cephalisca Nartshuk, 1959, Platycephala Fallén, 1820, Eurina Meigen, 1830, Trichieurina Duda, 1933, and Camarota Meigen, 1830 (Nartshuk, 1983, 1987). The rather numerous species of the genus Meromyza are sufficiently uniform in their external characters and easily distinguishable from those of other genera. The only exception is the Sakhalin- Japanese M. nipponensis Nishijima which differs from the other species in the black body and the structure of the male genitalia, especially the shape of the surstyli. This species was placed into a separate subgenus Nippomera Fedoseeva et Nartshuk, 1983 (Nartshuk and Fedoseeva, 1983). It is still unknown whether the Chinese, mostly black colored M. nigripes Duda also belongs to this subgenus, since the male genitalia in this species have not been studied yet. Frey (1921) established the genus Aschabadicola Frey, 1921 for the Turkmenian species M. longicornis characterized by the elongated shape of the postpedi- cel. Although in the taxonomy of the family Chlo- ropidae the shape of the postpedicel is used as a genus-level character, establishment of the genus seems to be unjustified in this case since the shape of the pedicel in Aschabadicola longicornis only incon- siderably differs from that in other species, whereas in all the remaining characters A. longicornis remains within the limits of the genus and even the nomino- typical subgenus. Nartshuk (1984 : 264) considered Aschabadicola as a synonym of Meromyza in the cata- logue of the Palaearctic species. Smirnov and Fedoseeva (1967) attempted a study of the taxonomic structure of the genus Meromyza; how- ever the results appeared to be insufficiently informa- tive. Their analysis included many characters of col- oration, which are rather variable in this genus. The cited authors concluded that Meromyza was an exam- ple of an intermediate state between the completely homogeneous taxa and those distinctly subdivided into subgroups. Three groups of species can be clearly distinguished in the nominotypical subspecies by the structure of their male genitalia. One of them unites species close to M. pratorum Meigen, distinguished by long setae on the epandrium, narrow, more or less club-shaped surstyli, the posterior process of postgonites posi- tioned laterally of the anterior one and connected with