NO. 1710. TYPE-SPFJCIE8 OP' AMERICAN DIPTERA—COOUILLETT. 579 



Zeitschr., vol. 39, 1894, p. 141, selected the second species as type of a new genus, 

 Bostrichopygn. Not OJcenia Leuckart, 1826. Equals Okeniella Hendel, 1907. 



Okeniella Hendel, Wien. Ent. Zeit., vol. 26, p. 98, 1907. Change of name for 

 Okenia Zetterstedt, 1838, not of Leuckart, 1826. Type, Cordilura caudala Zetter- 

 STEDT. Syn., Okenia Zetterstedt, 1838, preoccupied. 



Olbiogaster Osten Sacicen, Biol. Centr.-Amer., Dipt., vol. 1, p. 20, 1886. 2siiecies. 

 Type, Rhyphus tamiatns Bellardi, the second species, by present designation. 



Olenochaeta Townsend, Trans. Amer. Ent. Soc, vol. 19, p. 114, 1892. 1 species. 

 Type, Distichoria varia Wulp (as kansensis, new species). Equals Distichona 

 WuLP, 1890. 



Olfersia Wiedemann, Auss. Zweifl. Ins., vol. 2, p. 605, 1830. Change of name for 

 Feronla Leach, 1817, not of Latreille, 1817. Type, Feronia spinifera Leach. Syn., 

 Feronia Leach, 1817, preoccupied. 



Oligarces Meinert, Nat. Tidsskr. for 1865, p. 237, 1865.* 1 species. Type, Oli- 

 garces jtaradoxus Meinert. 



OUgochsetus Mik, Jahresb. k. k. Akad. Gymnas., p. 7, 1878. 5 species. Type, 

 Medetera plumbella Meigen, the tirst species, by original designation. Equals Mede- 

 tera Fischer, 1819. 



Oligomera Doleschall, Nat. Tijdschr. Ned. Indie, vol. 14, p. 387, 1857. 1 species. 

 Type, Limnobia acrostacta Wiedemann (as javensis, new species). Equals Caloptera 

 GuERiN, 1829. 



Oligotrophus Latreille, Hist. Nat. Crust, et Ins. , vol. 14, p. 288, 1805. 1 species. 

 Type, Tipula juniperina Linn.eus (as "Tipule des gallesdu genevrier" of De Geer). 



Olina Desvoidy, Essai Myod., p. 812, 1830. 5 species. Type, Olina hirtipes Des- 

 voidv, the third species, by present designation. 



Oliviena Meigen, Syst. Beschr. Zweifl. Ins., vol. 7, p. 266, 1838. 1 species. Type, 

 Tachina longirostris Meigen. Equals Aphria Desvoidy, 1830. 



Omalocephala Macquart, Dipt. Exot., vol. 2, pt. 3, p. 231, 1843. 1 species. Type, 

 Omalocpphala fnsca Macquart. Not Omalocephala Spinola, 1839. Equals Tylemyia 

 GiGLio-Tos, 1893. 



Omegasjn-phus Giglio-Tos, Boll. Mus. Zool. Univ. Torino, vol. 6, no. 108, p. 4, 

 1891. No species. In 1892, 1 species. Type, Microdon coarctatus Loevv. 



Ommatius Wiedemann, Dipt. Exot., p. 213, 1821. 3 species. Type, Asilus mar- 

 ginellus Fabricius, the first species, by present designation. 



Omomyia Coquillett, Can. Ent., vol. 39, p. 76, 1907. 1 species. Type, Omomyia 

 hirsula Coquillett. 



Omphrale Meigen, Nouv. Class. Mouch., p. 29, 1800.* No species. Hypselura 

 Meigen, 1803, is a change of name. Type, Musca fenestralis Linn^us. Syn., Sceno- 

 pinns Latreille, 1802; Hypselura, Meigen, 1803; Atrichia Schrank, 1803; Cona 

 Schellenberg. 1803; Astoma Lioy, 1864. 



Onesia Desvoidy, Essai Myod., p. 365, 1830. 2 species (as 16). Type, Musca 

 sepulchralis Meigen, (equalling 15 of the supposed species), by designation of Ron- 

 DANi, Dipt. Ital. Prodr., vol. 1, 1856, p. 90 (as vespillo Fabricius). Syn., Melinda 

 Desvoidy, 1830; Bellardia Desvoidy, 1863; Maraidgna Lioy, 1864. 



Onodontha Rondani, Dipt. Ital. Prodr., vol. 1, p. 94, 1856. 1 species. Type, Ono- 

 dontha, penicUlata Rondani (as Hydrotxa floccosa Macquart). Equals Hydrotaea 

 Desvoidy, 1830. 



Onychogonia Brauer and Bergenstamm, Denkschr. Kais. Akad. Wiss. Wien, vol. 

 56, p. 100, 1889. 1 species. Type, Gonia Jiaviceps Zetterstedt. Equals Salmacia 

 Meigen, 1800. 



Ophelia Desvoidy, Essai Myod., p. 120, 1830. 2 species (as 5). Type, Tachina 

 campestris Fallen (equaling the last 3 supposed species), by present designation. 

 Equals Metopia Meigen, 1803, 



