534 PROCEEDINGS OF THE NATIONAL MUSEUM. 



ft. 



/ Dionnsea Meigen, Nouv. Class. Mouch., p. 24, 1800.* No species. Platyptera 



Meigen, 1803, is a change of name. Type, Empis platyptera Panzer. Syn., Platyptera 



Meigen, 1803; Macrostomus Wiedemann, 1817; Rhamphomyia Meigen, 1822; Eni- 



copteryx Stephens, 1829; Holoclera Schiner, 1860; Megacyttarus Bigot, 1880. 

 / Diostracus Loew, Neue Beitr., vol. 8, p. 43, 1861. 1 species. Type, Dioslracm 



prasinus Loew. 

 / Diotrepha Osten Sacken, Cat. Dipt. N. Amer., p. 219, 1878. 1 species. Type, 



Diotrejiha mirabilis Osten Sacken. 

 ^ Dipalta Osten Sacken, Bull. 3, U. S. Geol. Surv., p. 236, 1877. 1 species. Type, 



Dipalta serpentina Osten Sacken. 

 ' Diphysa Macquart, Dipt. Exot., vol. 1, pt. 1, p. 172, 1838. 2 species. Type, 



Xylophagus rufipalpus Wiedemann, the second species, by present designation. Not 



Diphysa Blainville, 1834. Equals Exaireta Schiner, 1867. 

 «/ Diplocentra Loew, Zeitschr. Ent. Breslau, vol. 13, p. 13, 1859. Change of name for 



Curtonotum Macquart, 1843, on account of alleged preoccupation. Type. Muscq 

 , gibba Fabricius. Equals Curtonotum Macquart, 1843. 



Diplomera Lioy, Atti Inst. Yeneto, ser. 3, vol. 9, p. 1349, 1864. 2 species (as 3 



Type, Tachina bisignata Meigen, the first species (as biguttata Meigen), by present 



designation. Equals Meigenia Desvoidy, 1830. 

 ^ Diplosis Loew, Dipt. Beitr., vol. 4, p. 20, 1851. 15 species. Type, Tipula pint De 



Geer, the ninth species, by designation of Eondani, Atti Soc. Ital. Sci. Nat., vol. 2, 



1861, p. 289. Equals Itonida Meigen, 1800. 

 y Diplotoxa Loew, Berliner Ent. Zeitschr., vol. 7, p. 54, 1863. 1 species. Type, 



Chlorops versicolor Loew. 

 •/ Dipsa Fallen, Spec. Ent. Meth. Exh., p. 20, 1810. 1 species. Type, Lonchop- 



tera lutea Panzer (as bifurcata, new species). Equals Lonchoptera Meigen, 1803. 

 i/ Dirhiza Loew, Dipt. Beitr., vol. 4, p. 21, 1850. 1 species. Type, Dirhvsa lateritixx 



Leow. 

 y Discobola Osten Sacken, Proc. Acad. Nat. Sci. Phila. for 1861, p. 226, 1862. 2 



species. Type, Limnobia argus Say, the second species, by present designation. 



Syn., Trochobola Osten Sacken, 1869. 

 v Discocephala Macquart, Dipt. Exot, vol. 1, pt. 2, p. 50, 1838. 3 species. Type, 



Dasypogon abdominalis Say (as rufiventris, new species), the third species, by present 



designation. Not Discocephala Laporte, 1832. Equals Holcocephala Lennicke, 



/ 



J 1 



Discocerina Macquart, Hist. Nat., Dipt., vol. 2, p. 527, 1835. 4 species. Type, 

 Nbtiphila ubscurella Fallen, the first species, by present designation. Syn., Clasiopa 

 /Stenhammer, 1844. 

 * Discomyza Meigen, Syst. Beschr. Zweifl. Ins., vol. 6, p. 76, 1830. 1 species. 



Type, Psilopa incurva Fallen. 

 y Distichona Wulp, Biol. Centr.-Amer., Dipt., vol. 2, p. 44, 1890. 1 species. 

 Type, Distichona varia Wulp. Syn., Pseudogermaria Bra per and Bergenstamm, 

 1891; Olenochseta Townsend, 1892. 



Ditomyia Winnertz, Ent. Zeit. Stettin, vol. 7, p. 14, 1846. 1 species. Type, 

 Mycetobia fasciata Meigen (as trifasciata, new species). 

 / Dixa Meigen, Syst. Beschr. Zweifl. Ins., vol. 1, p. 316, 1818. 3 species (as 4). 

 Type, Dixa maculata Meigen, the third (valid) species, by designation of Curtis, 

 Brit. Ent., 1832, p. 409. 

 y Dizonias Loew, Berliner Ent. Zeitschr., vol. 10, p. 30, 1866. 1 species. Type, 

 yDizonias phamicurus Loew. 



Docosia Winnertz, Verh. Zool.-Bot. Ges. Wien, vol, 13, p. 802, 1863. 2 species. 

 Type, Docosia valida Winnertz, the second species, by designation of Johannsen, 

 Gen. Ins., Dipt, Mycet, 1909, p. 92. 



