Demetera
{{short description|Genus of Dolichopodid flies from Afrotropical, Oriental and Australasian regions}}
{{Automatic taxobox
| taxon = Demetera
| display_parents = 2
| authority = Grichanov, 2011{{cite journal|last=Grichanov|first=I. Ya.|year=2011|title=Three new genera of Medeterinae (Diptera: Dolichopodidae) from Old World Tropics and Australasia|url=http://ibss.febras.ru/Files/FEE/00000332.pdf|journal=Far Eastern Entomologist|issue=225|pages=1–16|access-date=2018-04-15|archive-date=2018-03-17|archive-url=https://web.archive.org/web/20180317164757/http://ibss.febras.ru/Files/FEE/00000332.pdf|url-status=dead}}
| type_species = Medetera melanesiana
| type_species_authority = Bickel, 1987
}}
Demetera is a genus of flies in the family Dolichopodidae. It contains eight species formerly included in Medetera in the M. melanesiana species group. The species are found in the Afrotropical, Oriental and Australasian regions. According to Naglis and Bickel (2012), it was unwarranted to establish a separate genus for this group of species.{{cite journal|last1=Naglis|first1=S.|last2=Bickel|first2=D. J.|year=2012|title=Medetera (Diptera, Dolichopodidae) of Sri Lanka|journal=Zootaxa|volume=3188|issue=1|pages=55–63|doi=10.11646/zootaxa.3188.1.4|s2cid=3942755}}
Species
- Demetera demeteri (Grichanov, 1997)
- Demetera kokodensis (Bickel, 1987){{cite journal|last1=Bickel|first1=Daniel J.|title=A revision of the Oriental and Australian Medetera (Diptera: Dolichopodidae).|journal=Records of the Australian Museum|date=1987|volume=39|issue=4|pages=195–259|url=http://australianmuseum.net.au/uploads/journals/17676/170_complete.pdf|accessdate=22 December 2016|publisher=Australian Museum|location=Sydney|issn=0067-1975|doi=10.3853/j.0067-1975.39.1987.170|archive-date=12 May 2017|archive-url=https://web.archive.org/web/20170512185332/https://australianmuseum.net.au/uploads/journals/17676/170_complete.pdf|url-status=dead}}
- Demetera macalpinei (Bickel, 1987)
- Demetera malaisei (Bickel, 1987)
- Demetera melanesiana (Bickel, 1987)
- Demetera morobensis (Bickel, 1987)
- Demetera niuginiensis (Bickel, 1987)
- Demetera rhetheura (Bickel, 1987)