600 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 37. 



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

 Type, Rhujiliidolabls tenuipcs Osten Sacken, the first species, ))y original designation. 



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

 Sargtis (ir)natits Wiedemann. 



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

 Type, Rli(ij)]ii(nnidax ejiiscopus Osten Sacken. 



Rhaphiorhynchus Wiedemann, Dipt. Exot., p. 59, 1821. 1 species. Type, lihaphio- 

 rhynclius j>lanirentris Wiedemann. 



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

 Beschr. Zweill. 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., 

 Xiphandrium Loew, 1857. Not American. ] 



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

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

 Salmacia Meigen, 1800. 



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

 Rhicna'ssa chierea Loew. 



Rhingia ScoPOLi, Ent. Carn., p. 358, 1763. 1 species. Type, Rhingia austriaca 

 Meigen (as Conops rostrata Linn.eus). 



Rhinomya 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 Meigen (equaling the supposed species 2 to 6), by designation of Desvoidy, 

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

 1830; Cassidiemyia Macquart, 1835; Clista Meigen, 1838; Microcheilosia Macquart, 

 1855. 



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

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

 Wiedemann, 1828. 



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

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



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

 Rhipidia maculata Meigen. 



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

 Meigen, 1803, is a change of name. Type, Miisca rotundata Linn^us. Syn., Gym- 

 nosoma Meigen, 1803. 



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

 Type, Rhomhotliyria flavicosta Wulp. 



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

 Type, Oligotrophus 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 pleuropunctata Wiedemann. Not Rhopalomyia Rubsaamen, 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 vof. 7, No. 118, March 24, 1892, p. 1, 1 

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

 October, 1891. 



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

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

 ecjuals Pliorostoma Desvoidy. ) 



Rhynchocephalus Fischer, Mem. Soc. Imper. Moscow, vol. 1, p. 21", 1806.* 3 

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



