Scathophaga varipes ( Holmgren, 1883 )

Ozerov, A. L. & Krivosheina, M. G., 2021, A review of the genus Scathophaga Meigen, 1803 (Diptera: Scathophagidae) of Russia, Russian Entomological Journal 30 (2), pp. 201-246 : 240

Scathophaga varipes ( Holmgren, 1883)

Figs 41, 124–126.

varipes Holmgren, 1883: 175 ( Scatomyza ). Type-locality: “Novaja Semlia” ( Russia: Novaya Zemlya).

septentrionalis Becker, 1897: 397 ( Scatophaga ). Type-locality: Mt. Chernyshev, Novaya Zemlya ( Russia).

REMARK. The species was recorded in Russia from Novaya Zemlya, Dolgii I., Kolguev I. [ Holmgren, 1883: 175; Becker, 1897: 397; Gorodkov, 1970: 451, 1986: 34; Ovchinnikov, Makarova, 2016: 217], Taimyr Peninsula [ Ozerov, Barkalov, 2014: 564], Yakutia [ Bagachanova et al., 2016: 783], Chukotka, including Vrangel I. [ Gorodkov, 1986: 34; Ozerov, Krivosheina, 2014: 219], arctic zone of European part, Siberia and Yakutia [ Engelmark, 1999: 158, 159].

MATERIAL EXAMINED. Arkhangelsk Oblast: Novaya Zemlya, Matochkin Shar (73.349ºN 55.354ºE), 1–5.VIII.1889, K. Nosilov (10 ♂♂, 8 ♀♀, ZISP); Matochkin Shar (73.349ºN 55.354ºE), Pan’kovskaya lowland, 11–12.VIII.1889, K. Nosilov (14 ♂♂, 9 ♀♀, ZISP); Matochkin Shar (73.349ºN 55.354ºE), Nochuev stream, 11.VII.–1.VIII.1925, Vakulenko (11 ♂♂, 8 ♀♀, ZISP); Chukotka: Koluychin I. (67.464ºN 174.617ºW), 25–27.VII.1938, Druzhinin (1 ♂, ZISP); Shmidt (68.870ºN 179.374ºW), 18–19.VII.1963, 17.VII.1966, 11–17.VII.1971, 3.VII.1972, Gorodkov (2 ♂♂, ZISP); Krasnoyarsk Krai: Dikson (73.508ºN 80.529ºE), 8.VIII.1967, Gorodkov (6 ♂♂, 3 ♀♀, ZISP); Dikson I. (73.504ºN 80.325ºE), 29.VII.1948, Korotkevich (4 ♂♂, 1 ♀, ZISP); Lake Engel’gardt (75.101ºN 100.234ºE), 2.VIII.1967, Gorodkov (6 ♂♂, 3 ♀♀, ZISP); Khatanga Distr. (75.951ºN 103.652ºE), 10.VII.–10.IX.2010, A. Shmanyak (2 ♂♂, 1 ♀, ZMUM); Yakutia: Anabarsky Bay (ca. 73.502ºN 113.551ºE), 28. VI.1959 (1 ♂, ZMUM); Novosibirskie Islands, Blizhniy I. [= Bol’shoy Lyakhovsky I. (73.585ºN 142.163ºE)], 30.VII.–12.VIII.1912, Starokadomsky (56 ♂♂, 37 ♀♀, ZISP). See also Ozerov & Krivosheina [2014: 219] and Ozerov & Barkalov [2014: 564].

DESCRIPTION. Male. Female. Body-length 4.3– 7.0 mm.

Head. Frontal vitta yellowish-red, with delicate whitish reflection; fronto-orbital plate black, greyish dusted. Face, parafacial and gena yellow, with golden reflection. Postcranium black, densely greenish-grey dusted, but median occipital sclerite usually with blackish reflection. 3 orbital and 3–5 frontal setae present. Scapus and pedicel reddish, but blackish dorsally. Postpedicel black, but reddish basally or black completely, approximately 2 times as long as wide. Arista bare. Palpus yellow.

Thorax black, densely greenish-grey dusted. Acrostichals setulose in two rows, dorsocentrals (2–3)+4, intra-alars 1+2, supra-alars 1+2, postpronotals 2. Anepimeron covered with hairs. Scutellum black, greenish-grey dusted, with a pair of strong basal scutellar and a pair of strong apical scutellar setae, also with a pair of discal setulae.

Legs delicately greyish dusted. All coxae black; all femora black, but reddish apically or reddish completely; all tibiae and tarsi yellow. Male and female fore femur, mid and hind male femora without conspicuous setae. Male fore tibia without conspicuous setae. Female fore tibia with 2–3 anterodorsal, 0–2 posterodorsal, 1–2 posterior, 1 preapical dorsal, and 1 posteri- or apical setae. Female mid femur with a row of anterodorsal setae, also with 1 preapical posterior and 1 preapical posterodorsal setae. Mid tibia with 2–3 posterodorsal, 2 anterodorsal, 1–2 anteroventral/ventral, 1–2 posterior setae and a ring of apicals in both sexes. Female hind femur with a row of anterodorsal setae and a row of anteroventral setae in apical half. Hind tibia with 3–4 anterodorsal, 2–4 posterodorsal, 3–4 anteroventral, 1 preapical dorsal, 1 preapical anterodorsal, 1 apical anterior, 1 apical anteroventral, and 1 apical ventral setae in both sexes.

Wing tinged with brownish; crossveins r-m and d-m strongly darkened.

Abdomen black, greenish-grey dusted, covered with hairs in male, without marginal setae or setulae in both sexes. Male sternite 4 about 1.5 times as long as wide (Fig. 41); sternite 5 with wide triangular lateral lobes, without median processes ( Fig. 124 ). Epandrium, cercal plate and surstyli as in Figs 125, 126 .

DISTRIBUTION. Russia: northern tundra from Siberia to Chukotka; Novaya Zemlya. — North America.

Figures

Figs 124–129. Scathophaga varipes (Holmgren) (124–126) and S. yakutica Ozerov (127–129): 124, 127 — male sternite 5; 125, 128 — epandrium, cercal plate and surstyli, lateral view; 126, 129 — same, dorsal view. 127–129 — after Ozerov, 2017, figs 1–3. Рис. 124–129. Scathophaga varipes (Holmgren) (124–126) и S. yakutica Ozerov (127–129): 124, 127 — стернит 5 самца; 125, 128 — Эпандрий, церки и сурстили, сбоку; 126, 129 — то же, сверху. 127–129 — по Ozerov, 2017, figs 1–3.