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We provide the first record of the genus Lepidiella Enderlein, 1937 from the Oriental Region with the description of Lepidiella limicornissp. nov., based on two male specimens collected in Thailand. Additionally, we provide a list of the world species of Lepidiella and discuss the diagnosis and taxonomic placement of the genus.

A new species of the Neotropical genus Alepia Enderlein, 1937 is described from the Azores Archipelago based on morphological characters and DNA barcodes from male and female specimens. Images of the new species as well as a discussion of the origin of this species are also provided. Moreover, we include an identification key for the adult male Psychodidae species recorded on the Azores Archipelago and comment on each species present on these islands. This is the first record of the genus Alepia from Azores.

We revise the Oriental species of Bruchomyiinae based on type and additional material, with first descriptions of the genus Alexanderia Wagner & Kvifte, gen. nov. and A. thailandensis Wagner, Rulik & Polseela, sp.nov. The genus further comprises Nemapalpus orientalis Edwards, 1928 (type species), Nemopalpus vietnamensis Quate, 1962 and Nemapalpus unicolor Edwards, 1928. Alexanderia thailandensis is described using morphology of males and females and DNA barcodes, whereas A. orientalis Edwards, 1928 comb.nov., A. unicolor Edwards 1928 comb.nov., and A. vietnamensis Quate 1962 comb. nov. are redescribed. The male and female internal genitalia in the genus are discussed in the context of sexual selection, and we suggest that the spermathecal ducts of the female and the basiphallic musculature of the male may be shaped by a male/female coevolutionary arms race.

Classification of Psychodinae has been a hotly contested topic in the taxonomic literature, with multiple mutually incompatible classifications proposed. Three main points of contention can be identified: (i) the validity of Maruinini Enderlein as a tribe‐level taxon and whether it forms a monophyletic group; (ii) the placement of subtribe Trichopsychodina Ježek – specifically whether it belongs with Psychoda Latreille in Psychodini or with Paramormia Enderlein and Telmatoscopus Eaton in Paramormiini Enderlein or Mormiini Enderlein; and (iii) whether Mormia Enderlein is more closely related to Brunettia Annandale or Paramormia Enderlein and Telmatoscopus Eaton. In the present paper, these questions are investigated using a molecular phylogeny of sequences compiled from all previous molecular phylogenies relevant to Psychodinae, as well as some hitherto unpublished sequences. The resulting matrix comprised 5406 base pairs from six markers for 32 taxa, and when analysed using Bayesian inference it yielded a well‐resolved tree which was unambiguous for all previously contentious points: Maruinini sensu lato (including Setomimini) was resolved as a valid taxon, Trichopsychodina is rendered paraphyletic by Psychodini, and Mormia is not closely related to Brunettia, but instead closer to Telmatoscopus and Paramormia. A revised tribal classification of Psychodinae is proposed, recognizing the tribes Psychodini, Brunettiini, Maruinini and Pericomaini as well as 17 unplaced genera.

Chaoborus ceratopogones (Theobald, 1903) is recorded for the first time from Reunion Island and C. fryeri Verbeke, 1958 for the first time from Ghana. Both species are briefly rediagnosed to account for differences with previously described populations. Additional new material of C. ceratopogones from Ghana and C. pallidipes (Theobald, 1911) from Uganda is presented.

Gondwanoscurus curleri sp. nov. is described based on four males collected in November 1990 and April 1991 in the West Usambara Mountains, Tanzania. It is the first species of Gondwanoscurus Ježek, 2001 to be described from the African mainland, and the second from the Afrotropical Region. The new species is characterized by a strongly asymmetric first flagellomere with a large mesal projection; and by several genitalic characters including simple gonostyli with acuminate apices and the surstylus without discernable basal projection. A key to world species of Gondwanoscurus is presented based on data from the literature.

CorethrellaoppositophilaKvifte & Bernal,sp. n.is described based on one male and six female specimens collected at 2200 m a.s.l. on Mount Wilhelm, Papua New Guinea. The species is the fourth species of frog-biting midge described from this country and appears similar toCorethrellasolomonisBelkin based on pigmentation of legs and abdominal tergites. It differs fromC.solomonis, however, in the shape of female flagellomeres I–III, and in the thorax which has a dark brown vertical stripe. The new species is named for its sexually dimorphic flagellomeres, which are short and squat in the female and elongate in the male. These differences in morphological characters are discussed in light of the likely sexual differences in functional uses of the antennae, as males use them for mating only whereas females use them both for mating and prey location. An emended key is presented to the described Australopapuan species of Corethrellidae.

Pericoma miljenkoi sp. nov. is described based on adult males from the Plitvička jezera National Park, Croatia. Pericoma trifasciata is recorded from Croatia for the first time, and COI DNA barcodes are given from specimens collected in Germany. An emended key to adult Pericoma of the trifasciata group is presented. The Croatian Psychodidae fauna now stands at 35 species.

Study of all flies (Diptera) collected for one year from a four-hectare (150 x 266 meter) patch of cloud forest at 1,600 meters above sea level at Zurquí de Moravia, San José Province, Costa Rica (hereafter referred to as Zurquí), revealed an astounding 4,332 species. This amounts to more than half the number of named species of flies for all of Central America. Specimens were collected with two Malaise traps running continuously and with a wide array of supplementary collecting methods for three days of each month. All morphospecies from all 73 families recorded were fully curated by technicians before submission to an international team of 59 taxonomic experts for identification. Overall, a Malaise trap on the forest edge captured 1,988 species or 51% of all collected dipteran taxa (other than of Phoridae, subsampled only from this and one other Malaise trap). A Malaise trap in the forest sampled 906 species. Of other sampling methods, the combination of four other Malaise traps and an intercept trap, aerial/hand collecting, 10 emergence traps, and four CDC light traps added the greatest number of species to our inventory. This complement of sampling methods was an effective combination for retrieving substantial numbers of species of Diptera. Comparison of select sampling methods (considering 3,487 species of non-phorid Diptera) provided further details regarding how many species were sampled by various methods. Comparison of species numbers from each of two permanent Malaise traps from Zurquí with those of single Malaise traps at each of Tapantí and Las Alturas, 40 and 180 km distant from Zurquí respectively, suggested significant species turnover. Comparison of the greater number of species collected in all traps from Zurquí did not markedly change the degree of similarity between the three sites, although the actual number of species shared did increase. Comparisons of the total number of named and unnamed species of Diptera from four hectares at Zurquí is equivalent to 51% of all flies named from Central America, greater than all the named fly fauna of Colombia, equivalent to 14% of named Neotropical species and equal to about 2.7% of all named Diptera worldwide. Clearly the number of species of Diptera in tropical regions has been severely underestimated and the actual number may surpass the number of species of Coleoptera. Various published extrapolations from limited data to estimate total numbers of species of larger taxonomic categories (e.g., Hexapoda, Arthropoda, Eukaryota, etc.) are highly questionable, and certainly will remain uncertain until we have more exhaustive surveys of all and diverse taxa (like Diptera) from multiple tropical sites. Morphological characterization of species in inventories provides identifications placed in the context of taxonomy, phylogeny, form, and ecology. DNA barcoding species is a valuable tool to estimate species numbers but used alone fails to provide a broader context for the species identified.

Kvifte, Gunnar Mikalsen, Curler, Gregory R., Marshall, Stephen A. (2018): Aquatic insects in the forest canopy: a new genus of moth flies (Diptera: Psychodidae) developing in slime on aerial roots. Journal of Natural History 52 (3-4): 137-153, DOI: 10.1080/00222933.2017.1410590, URL: http://dx.doi.org/10.1080/00222933.2017.1410590

Potophila verrucosa gen. n. et sp. n. is described based on a male from the West Usambara mountains, Tanzania. The genus and species are characterised by an elongate first flagellomere with the node more than three times as long as the internode, an asymmetrical aedeagus and two parameres carrying rugose morphoventral appendages. Potophila verrucosa cannot be placed in a systematic context with certainty, but several characters are consistent with a relationship to the tribe Psychodini.

A checklist of the families Chaoboridae, Dixidae, Thaumaleidae, Psychodidae and Ptychopteridae (Diptera) recorded from Finland is given. Four species, Dixella dyari Garret, 1924 (Dixidae), Threticus tridactilis (Kincaid, 1899), Panimerus albifacies (Tonnoir, 1919) and Panimerus przhiboroi Wagner, 2005 (Psychodidae) are reported for the first time from Finland.

The genus Perithreticus is recorded for the first time from Central America and the Caribbean. Two new species are described and figured: P. arboscandens Kvifte & Andersen, n. sp. from Zurquí, San José Province, Costa Rica and P. guantanamera Kvifte & Andersen, n. sp. from Alexander von Humboldt National Park, Guantánamo Province, Cuba. The generic diagnosis is emended to accommodate the newly described species, and a key to the males of the Perithreticus species of the world is presented. El género Perithreticus es registrado por primera vez para la región de Centroamérica y el Caribe. Dos nuevas especies son descritas e ilustradas, P. arboscandens Kvifte & Andersen, n. sp. de Zurquí, provincia de San José, Costa Rica y P. guantanamera Kvifte & Andersen, n. sp. del Parque Nacional Alejandro de Humboldt, provincia de Guantánamo, Cuba. La diagnosis del género es enmendada para acomodar las nuevas especies y se presenta una clave para los machos de las especies de Perithreticus del mundo. publishedVersion

Background The Trichoceridae are a small family distributed mainly in the Holarctic Region, most of which are associated with cold seasons and even snow. From the Iberian peninsula, 5 species have been recorded; however only a single previous occurence record exists from the Balearic islands. New information In this paper we present new records of two species from Mallorca, of which Trichocera (Saltrichocera) saltator (Harris, 1776) has not previously been recorded from the Balearic islands. Trichocera (Saltrichocera) annulata Meigen, 1818 is recorded for the first time from Mallorca. We furthermore discuss the species' distributions within the Mediterranean region and report new morphological data for the Mallorca island form of T. saltator.

Pericoma formosa Meunier, 1905 was described from Baltic amber and is of dubious systematic placement within the Psychodinae (Hennig, 1972; Meunier, 1905). Pericoma formosa Nielsen, 1964 was described from Zealand in Denmark and has later been found in Norway, France, Finland and the Czech and Slovak Republics (Ježek, 2006; Nielsen, 1964). The current work resolves the hitherto unrecognised homonymy of these names.

Historically, Telmatoscopus Eaton, 1904 has been a nomenclaturally and taxonomically problematic taxon as different authors have used different type species to define their concepts of the genus. Here it is shown that Pericoma advena Eaton, 1893 is the valid type species rather than Pericoma morula Eaton, 1893. Furthermore, the genus Seoda Enderlein, 1935 is revived for the genus comprising Pericoma labeculosa Eaton, 1893, P. morula and their relatives. The differences between Telmatoscopus and Seoda are described in detail based on historical and freshly collected material of the three putative type species. Four new synonymies are proposed: Panimerus havelkai Wagner, 1975 and Telmatoscopus seguyi Vaillant, 1990 are synonymized with Telmatoscopus advena, and Telmatoscopus incanus Nielsen, 1964 and Telmatoscopus vaillanti Withers, 1986 are synonymized with Seoda morula. A potential phylogenetic pattern in the male genital sclerites is discussed in detail. In Telmatoscopus, the jointed appendages of the gonocoxally derived parameral complex are separate small sclerites found near the bases of the distiphallic lobes of the aedeagus. In Seoda, they are fused medially to form a small, moveable triangular or arrow-shaped sclerite. Medial parameral sclerite fusion in Psychodinae is otherwise known to occur only in Pericomaini and the paramormiine genus Psychomasina Ježek, 2004; however, many genera of Paramormiini show an apparently intermediate condition where the parameres are fused in one end to form a V- or U-shaped "furca". It is hypothesized that Paramormiini is paraphyletic with respect to Pericomaini, as suggested in a previous phylogenetic hypothesis based on molecular data.

Berdeniella keroveci sp. nov. is described based on males collected in Croatia. Current knowledge of the psychodid fauna of Croatia is reviewed and new records of 16 species are presented. Short taxonomic notes on Pericoma pseudocalcilega Krek, 1972, Pneumia balkanica (Krek, 1990), Pneumia mutua (Eaton, 1893), Clogmia albipunctata (Williston, 1893) and Lepiseodina tristis (Meigen, 1810) are given. In total, 33 species of Psychodidae are known to occur in Croatia.

Psychoda cultella sp. n. is described. The new species is characterized by 16-segmented antennae with the three apicalflagellomeres globular, very short and partially fused; labellum with five terminal digital projections; aedeagus ca 1.7times the length of gonostylus; distiphallus bipartite, composed of a ventral phallomere with a roundish blunt tip and adorsal phallomere with pointed tip; basiphallus in lateral view sub-basally widened. The new species is known from Fin-land (29 localities) and Norway (6 localities), ranging from the southern boreal ecoregion to the subalpine zone. Psychoda cultella sp. n. is mainly found in Malaise trap samples collected from moist coniferous forests and spruce mires (riparianforests, springs) and rarely from fens and subalpine heaths. Two male specimens from Norway were reared from fruiting bodies of polypore fungi (either Fomes fomentarius or Piptoporus betulinus).