Imparipes obsoletus Rack, 1966

(Fig. 16)

Imparipes (Imparipes) obsoletus Rack, 1966: 99, figs. 5–7.

Imparipes (Imparipes) hystricinus degenerans Paoli, 1911: 259, figs. 57, 58, 60, misidentification

This species was described from Germany (Rack 1966). Ebermann (1979) recorded it from Austria from nests of Lasius flavus and L. niger . Mahunka (1977) recorded it from Switzerland from the ant Lasius umbratus Nylander. It was also recorded from France (Mahunka 1972), Hungary (Mahunka 1981, 1986), Ukraine (Sevastianov 1978; Sklyar & Sevastianov 1997) and the U.S.A. (Delfinado et al. 1976). Khaustov (2008) reported it from the Ukraine and from Russia (Crimea) on ants Lasius flavus, L. umbratus, L. alienus and Messor sp.

Material examined. Five females, RUSSIA, Tyumen Province, Kazanskiy District, vicinity of settlement Kazanskoye, 55° 37' 21.1"N, 69° 22' 17.7"E, in nest of Lasius flavus, 3 August 2014, coll. V.A. Stolbov; 13 females, RUSSIA, Tyumen Province, vicinity of lake Kuchak, 57°20'13.9"N, 66°03'30.4"E, on ants Lasius flavus, 15 May 2015, coll. A.A. Khaustov; 8 females, same date and place but in nest of Lasius flavus; 13 females, RUSSIA, Tyumen Province, Tyumen District, vicinity of settlement Reshetnikovo, 57°17'00.2" N, 65°24'32.5" E, on ants Lasius flavus, 25 September 2014, coll. T.A. Tarakanov; RUSSIA, Tyumen Province, Tyumen District, vicinity of Tyumen, 57°09'50.4"N, 65°27'26.7"E, on Lasius flavus, 24 September 2014, coll. A.A. Khaustov;