About Phasia obesa (Fabricius, 1798)
Phasia obesa (Fabricius, 1798) adults reach a length of 4–6 millimetres (0.16–0.24 inches). This species has large, reddish compound eyes; its antennae, including the arista, are black. The body is greyish, and the mesonotum has four longitudinal black bands separated by equally thick clear grey bands. Black setae are present on the side of the thorax, and the abdomen is black. The large wings have a light brownish shading; the R5 cell is closed at the wing edge, and the basicostae are black. In male individuals, the distance separating the two compound eyes is narrower than the width of the ocellar triangle. This fly occurs across the entire Palaearctic ecozone, with confirmed records from the British Isles, the Czech Republic, Estonia, Hungary, Lithuania, Poland, Romania, Slovakia, Ukraine, Denmark, Finland, Norway, Sweden, Bosnia and Herzegovina, Bulgaria, Corsica, Croatia, Cyprus, Greece, Italy, Portugal, Serbia, Slovenia, Spain, Turkey, Austria, Belgium, France, Germany, Liechtenstein, Netherlands, Switzerland, Japan, Kazakhstan, Iran, Israel, Lebanon, Palestine, Mongolia, Morocco, Russia, China and Transcaucasia.
