Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Clickable Guide
Moths Butterflies Flies Caterpillars Flies Dragonflies Flies Mantids Cockroaches Bees and Wasps Walkingsticks Earwigs Ants Termites Hoppers and Kin Hoppers and Kin Beetles True Bugs Fleas Grasshoppers and Kin Ticks Spiders Scorpions Centipedes Millipedes

Fall Fund Drive


Genus Xylomya

Xylomya - Xylomya tenthredinoides Xylomya - Xylomya tenthredinoides - male - female light brown - Xylomya Fly - Xylomya pallidifemur fly  - Xylomya pallidifemur Xylomyidae - Xylomya 3015395 Xylomya - Xylomya Xylomya terminalis? - Xylomya
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Diptera (Flies)
No Taxon (Orthorrhapha)
Infraorder Stratiomyomorpha
Family Xylomyidae
Genus Xylomya
Explanation of Names
Xylomya Rondani 1861
7 spp. in our area, 36 spp. worldwide(1)
Martin Hauser,
X. americana = only species with two longitudinal yellow stripes on thorax
X. aterrimus = only species with black palpi
X. fasciata = likely a Xylophagus (wings maculate), Say accidentally destroyed the specimen
X. parens = only species in the west and only species with black scutellum
X. pallidifemur = red legs and white hind basitarsus

Quick key
1. Scutellum black.... X. parens
Scutellum with yellow....2
2. thorax with yellow longitudinal stripes... X. americana
markings on thorax do not form stripes....3
3. tip of metafemur deep black.....5
tip of metafemur red brown or yellow....4
4. metafemur darker (brown) at apex, yellow at base; metatibial tip darker than base; metatarsus yellow.... X. simillima
meatfemur all reddish yellow, metatarsus white.... X. pallidifemur
5. palpi black.... X. aterrima
palpi yellow....6
6. terminalia black, tergites 3-4 yellowish.... X. terminalis (ne.US)
terminalia red, tergites red brown.... X. tenthredinoides
Eurasia (2/3 of the spp.) & the New World(1)
Works Cited
1.A catalog of the World Xylomyidae (Insecta: Diptera)
Woodley N.E. 2011. Myia 12: 417–453.