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Family Xylomyidae

Solva - Solva pallipes 3003049 - Xylomya pallidifemur Fly - Xylomya tenthredinoides Solva pallipes Dark fly with white legs - Solva pallipes Xylomya pallidifemur Brachyceran fly - Xylomya pallidifemur XylomyidaeX2 - Xylomya tenthredinoides - male - female Xylomyidae: Xylomya parens - Xylomya parens
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.