Portevinia maculata
{{Short description|Species of fly}}
{{Speciesbox
| image = Portevin.mac.jpg
| image_caption = Portevinia maculata (male)
| image2 = Port.maculata.female.jpg
| image2_caption = Portevinia maculata (female)
| status = LC
| status_system = IUCN3.1
| genus = Portevinia
| species = maculata
| authority = (Fallén, 1817)
| synonyms =
}}
Portevinia maculata, also known as the ramsons hoverfly, is a European species of hoverfly. The adults can be found around Allium species when the plants are in flower (May–June). The larvae tunnel through and overwinter in the bulbs of this plant.{{cite book|author1=Stubbs, Alan E.Carl Fredrik Fallen |author2=Falk, Steven J. |name-list-style=amp |year=1983 |title=British Hoverflies: An Illustrated Identification Guide|page=267, xvpp |publisher=British Entomological & Natural History Society}}
Description
[http://www.boldsystems.org/index.php/Taxbrowser_Taxonpage?taxid=30759 External images]
For terms see Morphology of Diptera
Tergites 2-4 with grey spots. Face very concave for upper two-thirds. Antennae red.
See references for determinationVan Veen, M. (2004) Hoverflies of Northwest Europe: identification keys to the Syrphidae. 256pp. KNNV Publishing, Utrecht.[http://home.hccnet.nl/mp.van.veen/syrphidae/boekhoverflies.html addendum]Van der Goot,V.S. (1981) De zweefvliegen van Noordwest - Europa en Europees Rusland, in het bijzonder van de Benelux. KNNV, Uitgave no.32: 275pp. Amsterdam.Bei-Bienko, G.Y. & Steyskal, G.C. (1988) Keys to the Insects of the European Part of the USSR, Volume V: Diptera and Siphonaptera, Part I. Amerind Publishing Co., New Delhi. {{ISBN|81-205-0080-6}}.Coe, R.L. (1953) Diptera: Syrphidae. Handbks.ident.Br.insects, 10(1): 1-98. R.ent.Soc.London. [http://www.royensoc.co.uk/sites/default/files/Vol10_Part01.pdf pdf]
Distribution
Palearctic Southern Norway to North Spain. Ireland East into Northern Europe and Central Europe as far as Liechtenstein, Austria and northern Italy.
Fauna EuropaeaPeck, L.V. (1988) Syrphidae. In: Soos, A. & Papp, L. (eds.) Catalogue of Palaearctic Diptera, 8: 11-230. Akad.Kiado, Budapest.
It can be found 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.{{Cite web |date=2021-02-22 |title=Ramson's Hoverfly |url=https://www.iucnredlist.org/species/149165173/149165184 |access-date=2022-05-18 |website=www.iucnredlist.org}}
Habitat
Portevinia maculata lives in deciduous woodland glades where Allium ursinum or Allium triquetrum also grow.{{cite journal | last = Speight | first = M.C.D. | year = 2011 | title = Species accounts of European Syrphidae (Diptera)| journal = Syrph the Net, the Database of European Syrphidae | volume = 65 | pages = 285pp | url= http://www.diptera.info/downloads/StN_Species_Accounts_Glasgow_2011.pdf }} It can be found at elevations up to 2000 metres above sea level.