Scathophaga crinita ( Coquillett, 1901 )

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 : 209

Scathophaga crinita ( Coquillett, 1901)

Figs 18, 55–57 .

crinita Coquillett, 1901: 612 ( Scatophaga ). Type-locality: “Bering Island” ( Russia: Commander Islands).

REMARK. This species was recorded in Russia for Far East (coasts of Chukotka and Kamchatka, Commander Islands) [ Coquillett, 1901: 612; Gorodkov, 1986: 30; Ozerov, Krivosheina, 2014: 216].

MATERIAL EXAMINED. Chukotka: 5 km N of Egvekinot (66.395ºN 179.132ºW), 26.VII.1963, Gorodkov (6 ♂♂, 5 ♀♀, ZISP) ; Goryachie klyuchi [? Lorino: 65.503ºN 171.704ºW], 10.VIII.1960, Kononov (5 ♂♂, 5 ♀♀, ZISP) ; same place, 7.VIII.1963, Gorodkov (4 ♂♂, 7 ♀♀, ZISP) ; Pevek (69.702ºN 170.298ºE), 25.VIII.1970, B. Petrova (1 ♂, 1 ♀, ZISP) ; Tkachen Bay (64.417ºN 172.818ºW), 25–26.VIII.1938, Rozanov (5 ♂♂, 1 ♀, ZISP) ; Ureliki (64.402ºN 173.210ºW), 3–6.VIII.1963, Gorodkov (1 ♂, 4 ♀♀, ZISP) ; Kamchatka Krai: Apuka env. (60.443ºN 169.602ºE), 1–2. and 30.VII.1959, Gorodkov (2 ♂♂, 6 ♀♀, ZISP) ;

Commander Islands , Mednyy I. (54.709ºN 167.709ºE), 1.VII.1958, Violovich (6 ♂♂, 2 ♀♀, ZISP) ; Commander Islands , Nikol’skoe (55.1961ºN 165.998ºE), 4, 6 and 14.IX.1959, Gorodkov (13 ♂♂, 2 ♀♀, ZISP) ; Commander Islands , Preobrazhenskoe (54.790ºN 167.578ºE), 6.VII.1911, Suvorov (1 ♂, ZISP) ; same place, 5 and 6.IX.1959, Gorodkov (4 ♂♂, 1 ♀, ZISP) . See also Ozerov & Krivosheina [2014: 216].

DESCRIPTION. Male. Female. Body-length 5.8– 10.0 mm.

Male thorax, abdomen and legs covered with dense, furry, crinkly, yellow hairs. Female has yellow hairs shorter; abdomen covered with yellow hairs on ventral surface only.

Head. Frontal vitta reddish-yellow, with delicate whitish reflection; fronto-orbital plate black, greyish dusted. Face, parafacial and gena reddish, with delicate whitish reflection. Postcranium black. 3 orbital and 5–6 frontal setae present. Antenna black. Postpedicel approximately 1.5 times as long as wide. Arista bare. Palpus yellow.

Thorax black, greyish dusted. Acrostichals in two rows, dorsocentrals (4–5)+(5–6), intra-alars 1+(2–4), supra-alars (1–2)+(2–4), postpronotals 2. Anepimeron bare. Scutellum black, greyish dusted, with a pair of strong basal scutellar and a pair of strong apical scutellar setae.

Legs black, shiny or subshiny. All femora covered with hairs, but without conspicuous setae. Fore tibia with rows of dorsal and posterodorsal setae. Mid tibia with 2–3 posterodorsal, 1–2 anterodorsal setae and a ring of apicals in both sexes, additionally with 1 ventral seta in female. Hind tibia with a comb of short stong apical setae on anterior surface in both sexes, additionally with rows of thin posterodorsal and anterodorsal setae in female.

Wing tinged with brownish; crossveins r-m and dm-cu not darkened.

Abdomen black, delicately greyish dusted. Male sternite 4 approximately 2 times as long as wide ( Fig. 18); sternite 5 with short lateral lobes, without median processes ( Fig. 55 ). Epandrium, cercal plate and surstyli as in Figs 56, 57 .

DISTRIBUTION. Russia: coasts along of Chukchi Sea (Pevek) to Bering Sea before Olutorsky Bay, Commander Islands. — North America.

Figures

Figs 52–60. Scathophaga cordylurina (Holmgren) (52–54), S. crinita (Coquillett) (55–57) and S. dasythrix (Becker) (58–60): 52, 55, 58 — male sternite 5; 53, 56, 59 — epandrium, cercal plate and surstyli, lateral view; 54, 57, 60 — same, dorsal view. Рис. 52–60. Scathophaga cordylurina (Holmgren) (52–54), S. crinita (Coquillett) (55–57) и S. dasythrix (Becker) (58–60): 52, 55, 58 — стернит 5 самца; 53, 56, 59 — Эпандрий, церки и сурстили, сбоку; 54, 57, 60 — то же, сверху.