Spilogona argentea ( Stein, 1907 )

Couri, Márcia & Pont, Adrian, 2020, Type specimens of Limnophorini (Diptera: Muscidae) deposited in the Museum für Naturkunde, Humboldt-Universität zu Berlin (Berlin, Germany), Zoologia (e 46879) 37, pp. 1-57 : 35

Spilogona argentea ( Stein, 1907)

Figs 133–136

Lectotype. Male. Paralectotype. Male. Lectotype designat- ed by Pont (2004: 84). China .

Diagnosis. Length of body. 4.5 mm (male). Head. Male holoptic. Fronto-orbital plate and parafacial silver shiny. Face grey dusted. Ocellar triangle and gena brown. Ocellar triangle dark brown, very short. Ocellar setae long.Eye with hairs.Antenna dark brown.Arista dark brown, short pubescent.Profrons a little projecting. Palpus dark brown. Gena at lowest eye margin about the same width as postpedicel. Oral margin not projecting forwards.Thorax. Scutum and pleura uniformly brown. Acrostichals developed, in 3–4 irregular rows.Dorsocentrals 2+3. Notopleuron without setulae. Anepisternum with 1 interspatial seta. Haltere yellowish-brown. Calypters white. Legs. Brown. Fore tibia without a posterior seta. Mid tibia with 2 posterior setae on middle third; without anteroventral and anterodorsal. Hind tibia with 3–4 anterodorsal setae; 3 anteroventrals in apical third; without posterodorsal. Arolium and pulvillus enlarged. Wing. Costal spine indistinct. Abdomen. Tergites 3–5 silver pruinose, contrasting with the brown tergite 1+2 and the 2 brown median spots on tergite 3. Sternite 1 bare.

Remarks. The species can be identified in the key by Hennig (1959) and is immediately recognised by the colour pattern of the abdomen.