About Portevinia maculata (Fallén, 1817)
For terminology related to the morphological features of this species, refer to the Morphology of Diptera. The diagnostic morphological traits of Portevinia maculata are as follows: tergites 2 through 4 bear grey spots; the face is strongly concave across its upper two-thirds; and the antennae are red. Additional details for species identification can be found in the cited references. This is a Palearctic species. Its range extends from southern Norway south to northern Spain, and from Ireland east through northern and central Europe as far as Liechtenstein, Austria, and northern Italy. It has been recorded in the following countries: Austria, Belgium, Czechia, Denmark, France, Germany, Ireland, Italy, Liechtenstein, Montenegro, Netherlands, Norway, Poland, Romania, Slovakia, Spain, Sweden, Switzerland, Ukraine, and the United Kingdom. Portevinia maculata inhabits glades within deciduous woodland, specifically in locations where either Allium ursinum or Allium triquetrum grows. It can be found at elevations up to 2000 metres above sea level.
