no. 1719. TYPE-SPECIES OF AMERICAN DIPTERA— COQUILLETT. 579 



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



Bostrichopyga. Not Okenia 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 caudata Zetter- 



stedt. Syn., Okenia Zetterstedt, 1838, preoccupied. 

 u Olbiogaster Osten Sacken, Biol. Centr.-Amer., Dipt., vol. 1, p. 20, 1886. 2 species. 



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

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



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



Wulp, 1890. 

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



Feronia 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 paradoxus Meinert. 

 \' Oligochsetus Mik, Jahresb. k. k. Akad. Gymnas., p. 7, 1878. 5 species. Type, 



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



tera Fischer, 1819. 

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



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



Guerin, 1829. 

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



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

 Olina Desvoidy, Essai Myod. , p. 81 2, 1830. 5 species. Type, Olina hirtipes Des- 



voidy, the third species, by present designation. 

 -' Olivieria Meigen, Syst. Beschr. Zweifl. Ins., vol. 7, p. 266, 1838. 1 species. Type, 



Tachina longirostris Meigen. Equals Aphria Desvoidy, 1830. 

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



Omalocephala fusca Macquart. Not Omalocephala Spinola, 1839. Equals Tylemyia 



Giglio-Tos, 1893. 

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



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

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



ginellus Fabricius, the first species, by present designation. 

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



hirsula Coquillett.. 

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



Meigen, 1803, is a change of name. Type, Musca fenestrates Linnaeus. Syn., Sceno- 



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



Schellenberg, 1803; Astoma Lioy, 1864. 

 I 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; Maravigna Lioy, 1864. 



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



dontha penicillata Rondani (as Hydrotsea floccosa Macquart). Equals Hydrotaea 

 j Desvoidy, 1830. ' . 



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



56, p. 100, 1889. 1 species. Type, Gonia flaviceps 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. 



