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

Calendar
Upcoming Events

BugGuide is a National Moth Week Partner. How to add your National Moth Week 2021 photos. July 17-25.

Photos of insects and people from the Spring 2021 gathering in Louisiana, April 28-May 2

National Moth Week 2020 photos of insects and people.

Photos of insects and people from the 2019 BugGuide Gathering in Louisiana, July 25-27

Discussion, insects and people from the 2018 gathering in Virginia, July 27-29

Photos of insects and people from the 2015 gathering in Wisconsin, July 10-12

Photos of insects and people from the 2014 gathering in Virginia, June 4-7.

Photos of insects and people from the 2013 gathering in Arizona, July 25-28

Previous events


TaxonomyBrowse
Info
ImagesLinksBooksData

Family Xylomyidae

xylomyid - Xylomya pallidifemur Unknown Fly - Solva pallipes Xylomyidae, antenna - Xylomya simillima Solva pallipes Dark fly with white legs - Solva pallipes Diptera - Solva pallipes Unknown Fly - Solva pallipes Xylomya? - Xylomya tenthredinoides
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Diptera (Flies)
No Taxon (Orthorrhapha)
Infraorder Stratiomyomorpha
Family Xylomyidae
Synonyms and other taxonomic changes
Solvidae
revised in(1)
Explanation of Names
Xylomyidae Verrall 1901
Numbers
11 spp. in 2 genera in our area, ~140 described spp. in 4 genera worldwide(2)
Size
5-15 mm(3)
Identification
Head hemispherical, vertex flush with eyes, facial area and frons flush with eyes or a little depressed, eyes bare, males dichoptic but distance between eyes narrower than in female, antennae as long as or longer than the head, flagellum consisting of 8 flagellomeres, tapering, but without a stylus, proboscis large, fleshly, palpus 2-segmented.
Scutellum short, evenly rounded apically, without spines, fore tibia without apical spurs, mid and hind tibiae with 1-2 apical spurs, usually 2, precoxal bridge present, empodia pulvilliform.
Wing always present, lying parallel to the abdomen at rest, always hyaline, branches of R not strongly crowded anteriorly, C extending beyond wing apex but no further than apex of M2, Rs arising well before base of cell d, R5 ending at apex of wing, cell d rather large, at least as close to posterior margin of wing as to anterior margin, crossvein r-m near base of cell d, 3 branches of M present, cells M3 and cup closed.
Abdomen with 7-8 distinct segments, tergite 1 often extensively membranous (4).
Range
much of the world, most diverse in Eurasia (>2/3 of the world fauna); both our genera are widespread in the Old World; other two genera are precinctive to n. India & Nepal and the Neotropics, respectively(2)
Habitat
wooded areas, larvae under bark(3)
Food
Larvae are predaceous or saprophagous(3)
Works Cited
1.A revision of the Nearctic species of the family Solvidae (Insecta: Diptera)
Webb D.W. 1984. Trans. Am. Ent. Soc. 110: 245-293.
2.A catalog of the World Xylomyidae (Insecta: Diptera)
Woodley N.E. 2011. Myia 12: 417–453.
3.American Insects: A Handbook of the Insects of America North of Mexico
Ross H. Arnett. 2000. CRC Press.
4.Manual of Nearctic Diptera Volume 1
Varies for each chapter; edited by J.F. McAlpine, B.V. Petersen, G.E. Shewell, H.J. Teskey, J.R. Vockeroth, D.M. Wood. 1981. Research Branch Agriculture Canada.