598 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 37. 



Pterodontia Gray, in Griflfith's Anim, Kingd., vol. 15, Ins., pt. 2, p. 779, 1832. 1 

 species. Type, Pterodontia flavipes Gray. 



PteroptUa Loew, Berliner Ent. Zeitschr., vol. 9, p. 165, 1865. 2 species. Type, 

 Pteroptila decora Loew, the first species, by present designation. Equals Meromacrus 

 EoND.\Ni, 1848. 



Pteroapilus Rondani, Dipt. Ital. Prodr., vol. 1, p. 152, 1856. 1 species. Type, Asilus 

 musairins Fabricius. P^quals Acromyia Latreille, 1809. 



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

 58, p. .'^75, 1891. 1 species. Type, Hypustenu obumhrata Wulp. 



Pt'dodexia Brauer and Bergenstamm, Denkschr. Kais. Akad. Wiss. Wien, vol. 56, 

 p. 119, 1889. 1 species. Type, Estheria tibialis Desvoidy (as carolinensis, new 

 species) . Equals Phorostoma Desvoidy, 1830. 



Ptilomyia Coquillett, Proc. U. S. Nat. Mus., vol. 22, p. 261, 1900. 1 species. 

 Type, I'tiloinyia enigma Coquillett. 



Ptilopareia Brauer and Bergenstamm, Denkschr. Kais. Akad. Wiss. Wien, vol. 56, 

 p. 101, 1889. 1 species. Type, Tachina marginataMEiGEN. Equals Voria Desvoidy, 

 1830. 



Ptilotachina Brauer and Bergenstamm, Denkschr. Kais. Akad. Wiss. Wien, vol. 58, 

 p. 350, 1891. 1 species. Type, Tachina civilis Rondani. Equals Exorista Meigen, 

 1803. 



Ptiolina Zetterstedt, Dipt. Scand., vol. 1, p. 226, 1842. 2 species. Type, Leptis 

 obscura Fallen, the first species, by designation of Frauenfeld, Yerh. Zool.-Bot. 

 Ges. Wien, vol. 5, 1855, p. 497. Syn., Eurytion, J.ennicke, 1867. 



Ptychoprodus Bigot, Rev. Mag. Zool. for 1859, p. 4, 1859. 1 species. Type, 

 PtycJioproctus complexus Bigot. Elquals Stylogaster Macquart, 1835. 



Plychoptera Meigen, lUiger's Mag., vol. 2, p. 262, 1803. 2 species. Type, Tipula 

 contaminata Linn^us, the first species, by designation of Latreille, Consider. Gen- 

 eral., 1810, p. 442. Equals Liriope Meigen, 1800. 



Puliciphora Dahl, Zool. Anzeiger, vol. 20, p. 409, 1897. 1 species. Type, Pulici- 

 phora lucifera Dahl. Syn., Stethopathus Wandolleck, 1898; PachyneureUa Brues, 

 1903. 



PuUata Harris, Exp. Engl. Ins., p. 76, 1776. 6 species. Type, Tipula pomonse 

 Fabricius (as funestus, new species), the second species, by present designation. 

 Equals Bibio Geoffroy, 1762. 



Purpurrlla Desvoidy, Dipt. Env. Paris, Mvop., p. 37, 1853.* 1 species. Type, 

 Purpurella nobilis Desvoidy. Equals Stomoxoides Sch.effer, 1766. 



Pycnoglossa Coquillett, Proc. U. S. Nat. Mus., vol. 23, p. 613, 1901. 1 species. 

 Type, I'ljcnorjlosm. flavipennis Coquillett. 



Pycnopogon LoEw, Linn. Ent., vol. 2, p. 526, 1847. 4 species. Type, Dasypogon 

 mixtiis Loew, the third species, by designation of Rondani, Dipt. Ital. Prodr., vol. 1, 

 1856, p. 157. 



Pycnosoma Brauer and Bergenstamm, Denkschr. Kais. Akad. Wiss. Wien, vol. 61, 

 p. 623, 1894. 1 species. Type, Chrysomya rcg(dis Desvoidy (as marginaJis Wiede- 

 mann). Equals Chrysomya Desvoidy, 1830. 



Pygostolus Loew, Berliner Ent. Zeitschr., vol. 10, p. 16, 1866. 3 species. Type, 

 Dasypogon politus Say (as argentifer, new species). Not Pygostolus Haliday, 1833. 

 Equals Nicocles J.ennicke, 1867. 



Pyrellia Desvoidy, Essai Myod., p. 462, 1830. 3 species (as 9). Type, Musca 

 cadaverina Linn.eus, the second to fourth supposed species, by designation of Zetter- 

 stedt, Dipt. Scand., vol. 4, 1845, p. 1320. 



Pyrgota Wiedemann, Auss. Zweifl. Ins., vol. 2, p. 580, 1830. 1 species. Type, 

 Pyrgatn luidata WiEBEyiAT^'s. Syn., Oxycepluda Macquart, 1843. 



Pyritis Hunter, Can. Ent., vol. 29, p. 131, 1897. 1 species. Type, Pyritis monti- 

 gena Hunter. 



