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Info
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Genus Xylophagus

Large fly - Xylophagus decorus - female Xylophagid - Xylophagus Xylophagidae, larval exuviae - Xylophagus another Xylophagus? - Xylophagus reflectens Xylophagus Xylophagus Fluorescent Xylophagidae Larva 2 - Xylophagus puzzling larva - Xylophagus
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Diptera (Flies)
No Taxon (Orthorrhapha)
Family Xylophagidae
Genus Xylophagus
Explanation of Names
Xylophagus Meigen 1803
Numbers
7 spp. in our area in 2 subgenera, 24 total(1)(2)
Identification
key to NA species:
1. Scape < 3X length of pedicel (2)(subgenus Xylophagus)
Scape > 3X length of pedicel (5)(subgenus Archimyia)
2. Frons/Occiput enitrely pruinose (3)
Glossy band dorsal of antennae (4)
3. Metacoxa w/ anteromedial tubercle; Northeast X. nitidis
Metacoxa w/o anteromedial tubercle; West Coast to Alaska X. gracilis
4. Sternopleuron/Hypopleuron glossy; abdomen entirely black in both sexes; Eastern X. lugens
Sternopleuron/Hypopleuron w/ pruinosity; basal portion of abdomen orange in female; Widespread X. cinctus
5. Frons/Occiput glossy; Boreal/Northeast/Colorado X. fulgidus
Frons pruinose (6)
6. Pedicel 1.5X ocellar distance; Eastern X. reflectens
Pedicel < 1.5X ocellar distance; West Coast X. decorus
Range
holarctic; across NA(1)
Works Cited
1.A catalog of the World Xylophagidae (Insecta: Diptera)
Woodley N.E. 2011. Myia 12: 455–500.
2.A Revision of the Nearctic Species of Xylophagus (Diptera: Xylophagidae)
Webb, D.W. 1979. Journal of the Kansas Entomological Society Vol. 52, No. 3, pp. 489-523.