Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada

Genus Delia

Seed/root maggot - Anthomyiidae - Delia - female Root-Maggot Fly - Delia - male  Family Anthomyiidae - Root-Maggot Flies Genus Delia - Delia bean seed fly - Delia platura - female Root-maggot Fly - Delia - male Anthomyiidae? - Delia - male Root-Maggot Fly - Delia - male Male, Anthomyiidae? - Delia - male
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Diptera (Flies)
No Taxon (Calyptratae)
Superfamily Muscoidea
Family Anthomyiidae (Root-Maggot Flies)
Genus Delia
Synonyms and other taxonomic changes
Delia Robineau-Desvoidy, 1830
Formerly considered a subgenus of Hylemya, to which it is not closely related.
Explanation of Names
Robineau-Desvoidy used female first names for some of his genera.
Numbers
100+ species in North America
Identification
Male with flat abdomen (also in a few other genera). Males of some of the common species have a large number of short posteroventral bristles on the hind tibia. Usually more than 2 posterodorsal bristles on hind tibia. Usually dark gray with black legs. Some species can be mostly orange.

See (1) for information on some of the common pest species.
Range
Cosmopolitan, but primarily in boreal to arctic regions of the Northern Hemisphere.
Remarks
Nearctic species were revised by Griffiths in Anthomyiidae volumes 7-10 of Flies of the Nearctic Region published from 1991 to 1993.
Works Cited
1.Identification of Delia pest species (Diptera: Anthomyiidae) in cultivated crucifers and other vegetable crops in Canada
Jade Savage, Anne-Marie Fortier, François Fournier, Véronique Bellavance. 2016. Canadian Journal of Arthropod Identification, No. 29.