620 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 37. 



Willistoniella Mik, Wien. Ent. Zeit., vol. 14, p. 136, 1895. Change of name for 

 Rhopalomyia Williston, 1895, not of Rubsaamen, 1892. Type, Ropalomera pleuro- 

 punctata Wiedemann. Syn., Rhopalomyia Williston, 1895, preoccupied. 



Winnertzia Rondani, Atti Soc. Ital. Sci. Nat. Milano, vol. 2, p. 287, 1860. 1 

 species. Tyjie, A.n/napta lugnhris Wixnertz. 



Winthemia Desvoidy, Essai Myod., p. 173, 1830. 3 species (as 8). Type, Musca 

 quddripiistulata Fabkicius (as species 2 to 4 and 6 to 8), by designation of Desvoidy, 

 Hist. Nat. Dipt., vol. 1, 1863, p. 207. Syn., Dorbina Desvoidy, 1847; Masipoda 

 Brauer and Bergenstajim, 1889; Catagonia Brauer and Bergenstamm, 1891. 



Wohlfahrtla Braver and Bergenstamm, Denkschr. Kais. Akad. AViss. Wien, vol. 56, 

 p. 123, 1889. 2 species. Type, Sarcophila magnifica Schiner, the first species, by 

 designation of Brauer and Bergenstamm, Verh. Zool.-Bot. Ges. Wien, vol. 43, 

 1893, p. 501. Equals Sarcophila Rondani, 1856. 



Wulpia Brauer aud Bercjenstamm, Denkschr. Kais. Akad. Wiss. Wien, vol. 60, p. 

 128, 1893. 1 species. Type, Widpia aperta Brauer and Bergenstamm. Not Wulpia 

 Bigot, 1886. Equals Vanderwulpia Townsend, 1891. 



■Wyeomyia Theobald, Journ. Trop. Med., vol. 4, p. 235, July 15, 1901. No species. 

 In his Monogr. Culic, vol. 2, November 23, 1901, p. 268, 6 species. Type, Wyeomyia 

 grayii Theobald, the first species, by designation of Neveu-Lemaike, Mem. Soc. 

 Zool. France, vol. 15, 1902, p. 223. 



Xanionotum Brues, Amer. Nat., vol. 36, p. 376, 1902. 1 species. Type, Xanionotum 

 hyKlrix Bhues. 



Xanthandrus Verrall, Brit. Flies, vol. 8, p. 316, 1901. 5 species. Type, Musca 

 coiiita Harris, the first species, by present designation. 



Xanthina Aldrich, Kansas Univ. Sci. Bull., vol. 1, p. 92, 1902. 1 species. Type, 

 Xaiithliiii jtlumicauda Aldrich. 



Xanthochlorus LoEW, Neue Beitr., vol. 5, p. 42, 1857. 2 species. Type, Porphy- 

 rops onidtus Haliday, the first species, by present designation. Syn., Leptopus 

 Haliday, 1831, preoccupied. 



Xanthocrona Wulp, Biol. Centr.-Amer., Dipt., vol. 2, p. 392, 1899. 1 species. 

 Type, Xanthocrona hipustulata Wulp. 



Xanihodexia Wulp, Biol. Centr.-Amer., Dipt, vol. 2, p. 256, 1891. 1 species. 

 Type, Tachiiiii c'merca Wiedemann. 



Xanthogramma Schiner, Wien. Ent. Monatschr., vol. 4, p. 215, 1860. No species. 

 In his Fauna Austr., Dipt., vol. 1, 1S62, p. 319, 3 species. Type, Musca pedissequua 

 Harris (as Syrphus ornatus Meigen), the second species, by designation of Williston, 

 Synop. N. Amer. Syrph., 1886, p. 91. 



Xanthomelana Wulp, Tijdschr. Ent, vol. 35, p. 188, 1892. 6 species. Type, 

 Xatdhomelana gracilenta Wulp, the fifth species, by present designation. Syn., 

 XanUiomelanodeti Townsend, 1893. 



Xanthomelanodes Townsend, Can. Ent, vol. 25, p. 167, 1893. Change of name for 

 XantJiomchina Wulp, 1892, under the mistaken impression that the latter is preoc- 

 cupied by Xanthomelou Martens, 1860, or by A'aj^^/zow/e/cm.T Bonaparte, 1850 (a descrip- 

 tive term for a color-group in the genus Euplectes). Type, Xantliomelana gracilenta 

 Wulp. Equals Xanthomelana Wulp, 1892. 



Xanthotricha Aldrich, Trans. Ent. Soc. Lond. for 1896, p. 339, 1896. 3 species. 

 Type, Xanthotricha cupulifera Aldrich, the first species, by present designation. 

 Equals Thrypticus Gerst.ecker, 1864. 



Xenochaeta Snow, Kansas Univ. Quart. , vol. 2, p. 166, 1894. 1 species. Type, Xeno- 

 ch:iia dichroniata Snow. 



Xenomyza Wiedemann, Zool. Mag., vol. 1, pt. 1, i>. 60, 1817. 2 species. Type, 

 Duiiiiilis jdaniceps Fabricius, the first species, by present designation. Syn., Chalci- 

 dimorpha Westwood, 1835. 



