Plecia is a genus of March flies (Bibionidae) comprising many species, both extant and fossilised. Several species of this genus are commonly known as "lovebugs" due to their behavior of flying around coupled together while mating.
Extant species: - P. acutirostris
- P. adiastola
- P. affinidecora
- P. americana
- P. amplipennis
- P. aruensis
- P. angularis
- P. avicephaliforma
- P. bicuspidata
- P. bifida
- P. bifoliolata
- P. bisulca
- P. boliviana
- P. chinensis
- P. crenula
- P. curtispina
- P. cuspidata
- P. digitiformis
- P. dileracabilis
- P. dimidiata
- P. duplicis
- P. edwardsi
- P. emeiensis
- P. erebea
- P. erebeoidea
- P. forcipiformis
- P. fulvicollis
- P. hadrosoma
- P. hamata
- P. impilosa
- P. intricata
- P. javensis
- P. lateralis
- P. lieftincki
- P. longifolia
- P. longiforceps
- P. lopesi
- P. mandibuliformis
- P. membranifera
- P. multilobata
- P. nagatomii
- P. nearctica – Lovebug
- P. obtusicornis
- P. obtusilobata
- P. oculastra
- P. okadai
- P. ornaticornis
- P. patula
- P. pellucida
- P. persimilis
- P. plagiata
- P. propeforcipata
- P. propria
- P. protea
- P. pruinosa
- P. pudica
- P. punctulata
- P. ramosa
- P. rhinigera
- P. rostellata
- P. rufangularis
- P. ruficollis – Harlequin fly
- P. rufimarginata
- P. rufiscutella
- P. rugosa
- P. serrifera
- P. spilota
- P. stricta
- P. tephra
- P. tetrascolata
- P. thulinigra
- P. trifida
- P. triquetra
- P. trunca
- P. xyele
Fossil species: Many fossil species have been assigned to
Plecia with ages dating from the Cretaceous (Campanian) through the early Pleistocene (Gelasian):
Cretaceous: - †P. myersi (Campanian, Canadian Amber, MB)
Paleocene: - †P. undans (Thanetian, ArdTun head, UK)
Eocene: ;Ypresian, Allenby Formation, Canada
- †P. angustipennis
- †P. canadensis
- †P. elatior
- †P. minutula (Allenby Formation)
- †P. nana (Allenby Formation)
- †P. pictipennis (Allenby Formation)
- †P. pulchra (Allenby Formation)
- †P. pulla (Allenby Formation)
- †P. similkameena (Allenby Formation)
- †P. transitoria (Allenby Formation)
- †P. tulameenensis (Allenby Formation)
Ypresian, Driftwood shales, Canada
Ypresian, Horsefly Shales, Canada
- †P. avus
- †P. curtula
- †P. dilatata
- †P. platyptera (Horsefly Shales)
- †P. reducta (Horsefly Shales)
Ypresian, "Mission Creek site", Canada
Ypresian, Oise amber, France
Ypresian, Green River Formation, USA
- †P. akerionana
- †P. dejecta
- †P. pealei
- †P. rhodopterina
- †P. winchesteri
- †P. woodruffi
Priabonian, Baltic Amber
- †P. borussica
- †P. brunniptera
- †P. clavifemur
- †P. hoffeinsorum
- †P. prisca
- †P. tenuicornis
Priabonian, France
- †P. angustiventris ( Célas site, France)
- †P. chapuisii
- †P. dumasi
- †P. foersteri
Pribonian, United Kingdom
- †P. acourti (Bembridge Marls, UK)
Priabonian, Florissant Formation, USA
- †P. axeliana
- †P. decapitata
- †P. explanata
- †P. gradata
- †P. melanderi
- †P. orycta
- †P. tessella
Oligocene: ;Rupelian, Brunstatt, France
Rupelian, Corent, France
- †P. joannis
- †P. larteti
- †P. longipennis
- †P. pallida
- †P. rubescens
- †P. sauvagei
Rupelian, Calcaires de Vacheres Formation, France
- †P. assonensis
- †P. larguensis
- †P. maimensis
Rupelian, Chadrat, France
Chattian, Niveau du gypse d´Aix, France
- †P. livida
- †P. painvini
- †P. retracta
- †P. rhenana
Chattian, Camoins-les-Bains, France
Chattian, Rott Formation, Germany
- †P. collossea
- †P. conica
- †P. dubia
- †P. exigua
- †P. gracilenta
- †P. grossa
- †P. hypogaea
- †P. inflata
- †P. luctuosa
- †P. luteola
- †P. lygaeoides
- †P. macrocephala
- †P. morio
- †P. pennata
- †P. pinguis
- †P. proserpina
- †P. rhenana
- †P. sturmi
- †P. stygia
- †P. winnertzi
Miocene: ;Aquitanian, Mexican amber, Mexico
Burdigalian, Shanwang Formation. China
- †P. aculeolata
- †P. bivalvula
- †P. capitata
- †P. diatoma
- †P. fumosa
- †P. gracilentula
- †P. ludongensis
- †P. platoptera
- †P. rectivenia
- †P. solaris
- †P. spinula
- †P. villosa
- †P. vulcania
Burdigalian, Kudia River site, Russia
- †P. amagua
- †P. obsitula
- †P. kuznetzovi
- †P. kudiella
- †P. redempta
- †P. refracta
Burdigalian - Langhian, Cypris Formation, Czech Republic
Langhian, Chojabaru Formation, Japan
Serravallian, Radoboj Formation, Croatia
Serravallian, Oehningen beds Member (Upper Freshwater-Molasse), Germany
- †P. hilaris
- †P. jucunda
- †P. macilenta
Messinian, Monte Castellaro, Italy
- †P. baglii
- †P. castellaroi
- †P. pisaurensis
Pliocene: ;Piacenzian, Togo Formation, Japan
Pleistocene: ;Gelasian, Lac Chambon, France
- †P. brunneipennis
- †P. vergnei
Revision of the Bibionidae fossil record from the Oligocene of Germany by Skartveit and Wedmann (2021) included the redescription of a number of Plecia
species.Hesperinus heeri
(formerly Plecia heeri
and syn P. elegantula´´ )