600 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 37. 



Rhaphidolabis OsTEN Sacken, Monogr. Dipt. N. Amer., vol. 4, p. 284, 1869. 2 species. 

 Type, rjinphidolabis tenuipes Osten Sacken, the first species, by original designation. 



Rhaphiocera Macquart, Hist. Nat., Dipt., vol. 1, p. 253, 1834. 1 species. Type, 

 Sargits arvintus Wiedemann. 



Rhaphiomidas Osten Sacken, Bull. 3, U. S. Geol. Surv., p. 281, 1877. 1 species. 

 Type, lihiipliidmidas episcopus Osten Sacken. 



Rhaphiorhynchus Wiedemann, Dipt. Exot., p. 59, 1821. 1 species. Tyi)e, lihaphio- 

 rhynchus planirentris Wiedemann. 



[Rhaphium Meigen, Illiger's Mag., vol. 2, p. 272, 1803. No species. In his Syst. 

 Beschr. Zweifl. Ins., vol. 4, 1824, pp. 28 to 31, 9 species. Type, Rhaphium macrocerum 

 Meigen, the third species, by designation of Curtis, Brit. Ent., 1835, p. 568. Syn., 

 Xiphnndrium luOEw, 1857. Not American.] 



Rhcdia Desvoidy, Essai Myod., p. 74, 1830. 5 species (as 9). Type, Gonia aim 

 Meigen (as vicina, new species), the third species, by present designation. Ecjuals 

 Salmacia IMeigen, 1800. 



Rhicncessa Loew, Wien. Ent. Monatschr., vol. 6, p. 174, 1862. 1 species. Type, 

 RJiiouesm^ cinerea Loew. 



Rhingia Scopoli, Ent. Carn., p. 358, 1763. 1 species. Type, Rhingia auslriaca 

 Meigen (as Conops rostrata Linn^us). 



Rliinomya Desvoidy, Essai Myod., p. 123, 1830. 1 species. Type, Rhinomya 

 gagatea Desvoidy. Equals Rhinophora Desvoidy, 1830. 



Rhinophora Desvoidy, Essai Myod., p. 258, 1830. 2 species (as 6). Type, Tachina 

 gagatina INIeigen (equaling the supposed species 2 to 6), by designation of Desvoidy, 

 Hist. Nat. Dipt., vol. 2, 1863, p. 5. Syn., Kirhya Desvoidv, 1830; Rhinomya Desvoidy, 

 1830; Cassidiemyia Macquart, 1835; CUsta Meigen, 1838; Microcheilo.va Macquart, 

 1855. 



Rhinoplecia Bellardi, Mem. Reale Accad. Sci. Torino, ser. 2, vol. 19, p. 16, 1859. 

 1 species. Type, Plena rostellata Loew (as rostrata, new species). Equals Plecia 

 Wiedemann, 1828. 



Rhinotora Schiner, Reise Novara, Zool., vol. 2, Dipt., p. 233, 1868. 2 species. 

 Type, Rhinotora pluriceUata Schiner, the first species, by original designation. 



Rhipidia Meigen, Syst. Beschr. Zweifl. Ins., vol. 1, p. 153, 1818. 1 species. Type, 

 Rhipidia rnacnlata Meigen. 



Rhodogyne INIeigen, Nouv. Class. Mouch., p. 39, 1800.* No species. Gymnosoma 

 Meigen, 1803, is a change of name. Type, Musca rotundata Linnaeus. Syn., Gym- 

 nosoma Meigen, 1803. 



Rhombothyria Wulp, Biol. Centr.-Amer. Dipt., vol. 2, p. 259, 1891. 1 species. 

 Type, RItomhothyria flavicosta Wulp. 



Rhopalomyia Rubsaamen, Berliner Ent. Zeitschr., vol. 37, p. 370, 1892. 8 species. 

 Type, Oligotrojihus tanaceticola Karsch, the first species, by designation of Kieffer, 

 Wien. Ent. Zeit., vol. 15, 1896, p. 89. 



Rhopalomyia Williston, Psyche, vol. 7, p. 184, 1895. 1 species. Type, Ropalo- 

 mera jyleuropunctata WiEDEyiAViS. ^ot Rhopalomyia RtJBSAAMEN, 1892. Equals Wil- 

 listoniella Mik, 1895. 



Rhopalosyrphus Giglio-Tos, Boll. Mus. Zool. Univ. Torino, vol. 6, No. 108, p. 

 3, September 20, 1891. No species. In vol. 7, No. 118, March 24, 1892, p. 1, 1 

 species. Type, Holmhergia guntheri Arribalzaga. Syn., Holmbergia Arribalzaga, 

 October, 1891. 



[Rhynchiodexia Bigot, Bull. Soc. Ent. France for 1885, p. 11, 1885. 1 species. 

 Type, Rhynchiodexia tenuipes Bigot. Not American.] {RJiynchiodexia of authors 

 equals Phorostoma Desvoidy.) 



Rhynchocephalus Fischer, Mem. Soc. Imper. Moscow, vol. 1, p. 217, 1806.* 3 

 species (as 4). Type, Rhynchocephalus tauscheri Fischer, the last species, by desig- 



