Bicellaria halterata Collin, 1961 (Figs 11–12) Bicellaria halterata Collin, 1961: 256. Type material examined. SYNTYPES: Great Britain: 23, Tomintoul, Banff, 8–11, August 1937 (OUM); 53, 1Ƥ, Banffshire, Tomintoul, 8–11.viii.1937, 1100 ft, R.L. & B.M. Coe; 13, Aberdeenshire, Braemar, 1.viii.1937, R.L. Coe—(BMNH). Additional material examined (133, 15Ƥ). Czech Republic: 13, Šumava Mts., Starý Brunst, along brook, 49°10'N, 13°16'E, 960 m, 21.viii.1989; 1Ƥ, Šumava Mts, S slopes of Pancíř, damp meadow, 49°09'N, 13°16'E, 1000 m, 24.viii.1989 —all M. Barták; 13, 1Ƥ, Krkonoše Mts., Slunečná stráň, nr. pond, 50°38'12.5''N, 14°49'23.6''E, 645 m, Malaise trap, 1.ix.-13.x.2009; 73, 6Ƥ, same locality, 4.viii.–1.x.2009; 23, same locality, 30.vi.–4.viii.2009; 13, Krkonoše Mts, Zrcadlový potok, nr. brook, 50°38'1.9''N, 14°43'54.6''E, Malaise trap, 18.viii.–1.ix.2009; 1Ƥ, Krkonoše Mts, Pekelský potok, nr. brook, 50°38'13.3''N, 14°40'29.3''E, Malaise trap, 30.vii.-18.viii.2009 –all J. Vanĕk; 13, Orlické hory Mts, Popelov, valley of Zdobnice river, 14.ix.1995, B. Mocek; 1Ƥ, Podyjí NP, Braitava, 48°52'35''N, 15°50'03''E, 26.vi.–30.vii.2002, Malaise trap; 1Ƥ, same locality, 30.vii.– 31.viii.2002 —all M. Barták et Š. Kubík—(CULSP). Russia: 2Ƥ, Moscow, Losiny ostrov, park vegetation, 55°19'N, 37°45'E, 4.ix.1988, M. Barták (CULSP); 1Ƥ, Permskaja oblasť Kamenka, env. of Lysva, 31.vii.1963, V. Zherikhin (ZMMU). Slovak Republic: 1Ƥ, Košecké Podhradie, mixed wood, 48°59'N, 18°17'E, 270 m, 29.vii.1989, M. Barták (CULSP). Diagnosis. The species is a member of B. nigra complex of species as proposed by Chvála (1991) characterized by swollen hind basitarsus, short posteroventral setae on hind tibia, and narrow face and comprising three species in Europe (B. nigra, B. nigrita, B. halterata). Males may be recognised easily according to the structure of the genitalia, possessing both phallic hooks, the left one with lateral triangular-shaped process best visible from below [not apparent in Collin (1961, fig. 89, p. 256)] and relatively short postgonites (Fig. 11). It is possible to distinguish B. nigra from B. halterata without dissection of the genitalia according to the shape of the hypandrial processes which are parallel in B. halterata but divergent towards apex in B. nigra (but this character should always be verified by dissection). Females sometimes have only slightly swollen hind basitarsi, so they may erroneously lead in the key to the R. sulcata complex, but it may be distinguished by yellow halteres, pale setose base of abdomen and swollen hind tibiae (opposite of B. simplicipes which is not a member of this complex). Distribution. Great Britain, Czech and Slovak Republics, European Russia. Probably more broadly distributed in temperate Europe but mixed in collections with B. nigra or B. intermedia. Remarks. The species was described (including illustrations of genitalia) from an unknown number of males and a single female taken at Tomintoul and Braemar (G. Britain) early in August 1937 by R.L. Coe. Since the original description no other record of this species has been published.

Published as part of Barták, Miroslav & Kubík, Štěpán, 2013, Species of Bicellaria Macquart (Diptera: Hybotidae) of Europe, with descriptions of four new species, pp. 251-278 in Zootaxa 3647 (2) on pages 258-259, DOI: 10.11646/zootaxa.3647.2.2, http://zenodo.org/record/224159