568 PR0CEEDIN08 OF THE NATIONAL MUSEUM. vol.37. 



MeropHits Rondani, Bull. Soc. Ent. Ital., vol. 6, p. 170, 1874. 1 species. Type, 

 Nemopoda stercoraria Desvoidy. Equals Nemopoda Desvoidy, 1830. 



Merosargus Loew, Verb. Zooi.-Bot. Ges. Wien, vol. 5, p. 144, 1855. 4 species. 

 Type, Sargas obscurus Wiedemann, the third species, by original designation. 



Mesembrina Meigen, Syst. Beschr. Zweifl. Ins., vol. 5, p. 10, 1826. 2 species. 

 Type, Musca meridiana Linn^us, the first species, by designation of Westwood, 

 Intr., vol. 2, Synops., 1840, p. 141. Syn., Metameseinbrina TowtmEt^D, 1908. 



Mesembrinella Giolio-Tos, Boll. Mus. Zool. Univ. Torino, vol. 8, No. 147, p. 4, 

 1893. 1 species. Type, Mesembriuella bicolor Giglio-Tos. 



Mesembrius Rondani, Dipt. Ital. Prodr., vol. 2, p. 50, 1857. 1 species. Type, 

 Helophilus peregrinvs Loevv. Equals Helophilus Meicjen, 1822. 



Mesogramma 'LoF.ys , Berliner Ent. Zeitschr., vol. 9, p. 157, 1865. 12 species. Type, 

 Syrphus gurgus Walker (as parvula, new species), the first species, by designation of 

 Williston, Synops. N. Ainer. Syrph., 1886, p. 98. Equals Toxomerus Macquart, 

 1855. 



Mesograpta Loevv, Berliner Ent. Zeitschr., vol. 16, p. 290, 1872. Change of name for 

 Mesogramma Loew, 1865, under the mistaken idea that the latter is preoccupied by a 

 genus of plants. Type, Syrphus gurges Walker. Pxpials Toxomerus Mac(iuart, 

 1855. 



Mesophila Walker, List Dipt. Brit. Mus., vol. 4, p. 1157, 1849. 1 species. Type, 

 Ceratophya fuscipennis Macqv ART. Equals Microdon Meigen, 1803. 



Mesorhaga Schiner, Raise Novara, Zool., vol. 2, Dipt., p. 217, 1868. 1 sjiecies. 

 Type, Mesorhaga trlstis Schiner. Syn., Aplorthns Aldrich, 1893. 



Messala Curtis, Brit. Ent., p. 581, 1836. 1 species. Type, Macrocera hybrida 

 Meigen (as satindersn, new species). Equals Bolitophila Meigen, 1818. 



Metachaeta Coquillett, Journ. N. Y. Ent. Soc, vol. 3, p. 98, 1895. 1 species. 

 Type, Tachina helymus Walker (as alra, new species). 



Metachela Coquillett, Proc. Ent. Soc. Washington, vol. 5, p. 253, 1903. 1 species. 

 Type, Hemerodromia collusor Melander. 



Metacosmus Coquillett, West. Amer. Sci., vol. 7, p. 220, 1891. 1 species. 

 Type, Metacosmus exilis Coquillett. 



Metadexia Coquillett, Journ. N. Y. Ent. Soc, vol. 7, p. 220, 1899. 1 species. 

 Type, Metadexia tricolor Coquillett. 



Metadiplosis Felt, 23d Rep. State Ent. N. Y., p. 406, 1908. 1 species. Type, 

 Metadiplosis s/rinosa Felt. 



Metadoria Brauer and Bergenstamm, Denkschr. Kais. Akad. AViss. Wien, vol. 60, 

 p. 117, 1893. 1 species. Type, Phorocera harbata Bigot (as mexicana, new species). 

 Syn., Hemiargyra Townsend, 1908. 



Metamesembrina Townsend, Smiths. Misc. Coll., vol. 51, p. 50, 1908. 1 species. 

 Type, Musca meridiana Linn^us. Equals Mesembrina Meigen, 1826. 



Metapelastoveurus Aldrich, Kansas Univ. Quart., vol. 2, p. 152, 1894. 1 species. 

 Type, Mrtnpelastoneuriis l-ansensis Aldrich. Equals Pelastoneurus Loew, 1861. 



Metaphragma Coquillett, Journ. N. Y. Ent. Soc, vol. 2, p. 97, 1894. 1 species. 

 Type, Xestomyza planiceps Loew. 



Metaphyto Coquillett, Rev. Tach., p. 36, 1897. 1 species. Type, Metaphylo 

 genalis Coquillett. 



Metaplagia Coquillett, Journ. N. Y. Ent. Soc, vol. 3, p. 102, 1895. 1 species. 

 Type, Metaplagia occidentalis Coquillett. 



Metapogon Coquillett, Proc. Ent. Soc Washington, vol. 6, p. 181, 1904. 2 spe- 

 cies. Type, Metajiogon gilvipes Coquillett, the first species, by original designation. 



Metatrichia Cocjuillett, Ent. News., vol. 11, p. 500, 1900. 1 species. Type, 

 Sccnopitnis bidboxua Osten Sacken. 



Methyposle.na Townsend, Smiths. Misc. Coll., vol. 51, p. 67, 1908. 1 species. Type, 

 Jlyposleiia barbala Coquillett. Equals Tachinophyto Townsend, 1892. 



