| Summary: | Stenus ( Nestus ) delitor sp. nov. (Figs. 5C, 6A, 7A) Material examined RUSSIA: Holotype: ♂, ‘Evenkia, [Baykitskiy District,] basin of Podka- | mennaya Tunguska River: Ko- | chumdek River 8–10 km up-stream of mouth |. 70 m a.s.l. [rill bank, among stones (mosses and litter). (He+Hm+Ho)]. 22–24.VII.1990. A.B. Ryvkin.’ , ‘262’, ‘HOLOTYPUS’ <my standard printed red label>, ‘ Stenus HT | delitor sp. n. | A.B. Ryvkin det., 2008’ <my standard determinative label> (ZMMU). – Paratypes: 1♂, together with holotype, ‘262’ (AR); 2 ♂♂, 1 ♀, ‘Evenkia, [Baykitskiy District,] Central Sibe- | rian [Biosphere] Reserve, basin of | Stolbovaya River: [upper reaches of] Raskol Rill (confluent of Dulkuma River), S | slope of Dulkuma | residual mountain. 250–330 [280] m a.s.l. [Bank of rill (left confluent of Raskol Rill): litter under Alnus sp., Abies sibirica , Picea obovata and mosses near water.] 16.VII. | 1991. A.B. Ryvkin’ , ‘132’ (AR, IRSN); 1 ♂, ‘ Tuva, [Todjenskiy District,] Azas Nature Reserve, basin | of Azas River: upper reaches of Kara | -Tesh River [(environs of the 3rd hut)]. 1150 m a.s.l. [ Carex spp., mosses and Poaceae with sparse Salix spp. etc. on river bank and near small flood-plain lake.] 06.VI. | 1990. A.B. Ryvkin’ , ‘64’, ‘ Stenus | illusor Ryv. | A.B. Ryvkin det., 1993’ <my standard determinative label> (AR); 1 ♂, ‘Khamar-Daban Mt. Ridge | pass in upper reaches | of L.[evaya] Mishikha River, 1800 m a.s.l. | foot of glacier | 1.VII.[19]75. Shilenkov’ , ‘ Stenus | latipennis | J. Sahlbg. | det. V.Puthz 1979’ , ‘ Stenus | illusor A. Ryv. | A.B. Ryvkin det. 1984’ <my standard determinative label> <specimen with endophallus dissected by Puthz> (AR). — The paratypes listed above are also provided with both ‘PARATYPUS’ printed red label and my standard determinative label (‘ Stenus | delitor sp. n. | A.B. Ryvkin det., 2008’) for each lot. Differential diagnosis Stenus delitor sp. nov. is closely related to both S. ( N. ) latipennis J. Sahlberg, 1880 and S . ( N .) illusor Ryvkin, 1987; ...
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