580 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.37. 



* / Ophromyia Williston, Biol. Centr.-Amer., Dipt., vol. 3, p. 55, Dec, 1891. 1 spe- 

 cies. Type, Ophromyia nasica Williston. Equals Megametopon Giglio-Tos, Sep- 

 tember, 1891. 

 i/ Ophthalmomyia Williston, Trans. Ent. Soc. Lond. for 1896, p. 426, 1896. 1 species. 



Type, Lobioptera lacteipennis Loew. Equals Milichiella Giglio-Tos, 1895. 

 u Ophyra Desvoidy, Essai Myod., p. 516, 1830. 3 species (as 4). Type, Anthomyia 



leucostoma Wiedemann (equaling the first 2 supposed species), by designation of 



Westwood, Intr., vol. 2, Synops., 1840, p. 142. 

 ^> Oplachantha Rondani, Arch. Zool., vol. 3, p. 87, 1864. 2 species. Type, Beris 



mexicana Bellardi, the first species, by original designation. Equals Beris Latreille, 



1802. 

 •/ Oplogaster Rondani, Dipt. Ital. Prodr., vol. 1, p. 98, 1856. 1 species. Type, 



Musca mollicula Fallen. 

 (/ Opomyza Fallen, Oponi. Svecise, p. 10, 1820. 3 species. Type, Musca germinationis 



Linnaeus, the first species, by designation of Westwood, Intr., vol. 2, Synops., 1840, 



p. 152. 

 "' Oppia Desvoidy, Hist. Nat. Dipt., vol. 2, p. 404, 1863. 1 species. Type, Tachina 



devia Fallen (as ciligera, new species). Equals Brachicoma Rondani, 1856. 

 ^ Opsebius Costa, Rend. Soc. Borb. Accad. Sci., new ser., vol. 5, p. 20, 1856. 



1 species. Type, Opsebius perspicillatus Costa. Syn., Pithogaster Loew, 1857. 

 * Opsidia Coquillett, Journ. N. Y. Ent. Soc, vol. 3, p. 102, 1895. 1 species. Type, 



Opsidia gonioides Coquillett. 

 ^ Opsiomyia Coquillett, Journ. N. Y. Ent. Soc, vol. 6, p. 162, 1898. 1 species. 



Type, Opsiomyia palpcdis Coquillett. 

 ^ Opsolasia, new genus. Type, Lasiops calvicrura Coquillett. (This is Lasiops 



of authors, not of Meigen. ) 



Orbellia Desvoidy, Essai Myod., p. 656, 1830. 2 species. Type, Orbellia myopi- 



formis Desvoidy, the first species, by present designation. Equals Heleomyza Fal- 

 len, 1810. 

 </ Orellia Desvoidy, Essai Myod., p. 765, 1830. 1 species. Type, Trypeia wiedemanni 



Meigen (as flavicans, new species). Syn., Goniglossum Rondani, 1856; GEdmpis 



Loew, 1862. 

 ^ Oreogeton Schiner, Wien. Ent. Monatschr., vol. 4, p. 53, 1860. 1 species. 



Type, Gloma basalis Loew. 

 </ Oreomyza Pokorny, Wien. Ent. Zeit., vol. 6, p. 50, 1887. 3 species. Type, Oreo- 



myza glacialis Pokorny, the first species, by present designation. Equals Tipula 



Linn.eus, 1758. 

 ^ Oreothalia Melander, Trans. Amer. Ent. Soc, vol. 28, p. 232, 1902. 1 species. 



Type, Oreothalia pelops Melander. 



Orillia Desvoidy, Ann. Soc. Ent. France for 1848, p. 474, 1848. 2 species (as 3). 



Type, Orillia rectinervis Desvoidy, the second species, by present designation. Equals 



Leskia Desvoidy, 1830. 

 f/ Orimarga Osten Sacken, Monogr. Dipt. N. Amer., vol. 4, p. 120, 1869. 1 species. 



Type, Limnobia alpina Zetterstedt. Syn., Ninguis Wallengren, 1881. 

 "" Orimargida Mik, Wien. Ent. Zeit., vol. 2, p. 198, 1883. 2 species. Type, Ori- 



margula alpigena Mik, the first species, by original designation. Equals Antocha 



Osten Sacken, 1860. 

 ^ Orizia Desvoidy, Hist. Nat. Dipt, vol. 2, p. 678, 1863. 2 species (as 6). Type, 



Musca rudis Fabricius (equaling the first 5 supposed species), by present designation. 



Equals Pollenia Desvoidy, 1830. 

 is Ormia Desvoidy, Essai Myod., p. 428, 1830. 1 species. Type, Ormia punctata 



Desvoidy. Syn., QZstrophasia Brauer and Bergenstamm, 1889; Phasiopteryx Brauer 



and Bergenstamm, 1889; Cenosoma Wulp, 1890; Neoptera Wulp, 1890; Eundrophaski 



Townsend, 1892. 





