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For Insects, Spiders & Their Kin
For the United States & Canada
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Species Pyrgota undata - Waved Light Fly

Pyrgotid Fly - Pyrgota undata Waved Light Fly - Pyrgota undata - female Fly - Pyrgota undata Fly I.D., please - Pyrgota undata Waved Light Fly - Pyrgota undata Wasp / fly? - Pyrgota undata interesting fly - Pyrgota undata Pyrgota undata
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Diptera (Flies)
No Taxon ("Acalyptratae")
Superfamily Tephritoidea
Family Pyrgotidae
Genus Pyrgota
Species undata (Waved Light Fly)
Explanation of Names
Pyrgota undata Wiedemann 1830
undata - Latin for 'waved'
12-18 mm
Most widespread eastern member of this genus. Large (18 mm), dark, waved edge to forewing.
e. N. Amer.
Deciduous forests, also meadows, etc., probably non-specific.
Mar-Jun (BG data)
Adults may not feed?
Life Cycle
Life history: Female lights on a feeding May beetle, causing it to take flight. Pyrgotid then oviposits into beetle's back while soft parts are exposed in flight. Flies usually attack female beetles only and may pursue them under lights. Larvae is about 1 cm long, takes about 14 days to kill host beetle and then consumes entire interior. Fly pupates inside host remains and pupates there, emerges following spring. (1)
See Also
- Range: sw US
Diacrita (Ulidiidae ยป Otitinae)
Print References
Swan and Papp, p. 624, fig. 1340 (1)
Arnett, p. 891, fig. 29.43, (2)
Brimley, p. 356 (3)
Internet References
species account - Insects of Quebec (French)
Works Cited
1.The Common Insects of North America
Lester A. Swan, Charles S. Papp. 1972. Harper & Row.
2.American Insects: A Handbook of the Insects of America North of Mexico
Ross H. Arnett. 2000. CRC Press.
3.Insects of North Carolina
C.S. Brimley. 1938. North Carolina Department of Agriculture.