114 Proceedings of the Biological Society of Washington. 



Dicraneura, Puton, A. Catalogue des Hemipteres ( Heteropteres, Cica- 

 dines et Psy Hides) de la Fa line Palearctique, 3rd ed. 1886, p. 86. 



Dicroneura, Woodworth, C. "W. On the genus Cicadula Zett. Psyche, 

 5, July- Aug., 1888, p. 75. 



Synonyms: Chloroneura Walsh 1862 (in part); Erythria and Notus* 

 Fieber, 1866. Which see. 



1851. ERYTHRONEURA. Fitch, Asa. Catalogue with references and 

 descriptions of the Insects collected and arranged for the State Cabi- 

 net of Natural History. Fourth Annual Report of the Regents of 

 the University of the State of New York on the State Cabinet of 

 Natural History, 1851, p. 62. Reprint Ninth Report on Insects of 

 New York, J. A. Lintner, 1893, p. 402. 



Described to include the new species E. vulnerata op. cit. pp. 62-63, 

 and 402-3, E. affinis and E. tricincta op. cit. p. 63 and 403, and Tetti- 

 gonia vitis Harris, T. obliqua Say and T. fabae Harris. 



The type species of this genus was not designated until 1912, when 

 Oshanin choset E. tricincta Fitch. 



Synonyms: Zygina and Idia Fieber, 1866. $ Which see. 



1851. EMPOA. Fitch, Asa. Catalogue Fourth Ann. Rep. Regents 

 Univ. N. Y. on State Cabinet Nat. Hist. 1851, p. 63, Reprint Ninth 

 Rep. Ins. N. Y. Lintner, 1893, p. 403. 



Established to include the new species E. querci and E. coccinea op. 

 cit. p. 63 and 403. 



Woodworth§ synonymizes this genus with Typhlocyba Germar, an action 

 concurred in by Distant, 1908 (see below), and Oshanin 1912. || 



Van Duzee, 1916, because of his erroneous application of the names 

 Typhlocyba and Eupteryx to the same genus, keeps Empoa in use. He 

 citesTT E. querci Fitch as genotype. Later in his Catalog** Van Duzee 

 inadvertently gives Distant as the authority for the selection of ' ' quercus ' ' 

 Fitch as the type species. What Distant really didtt was to cite as geno- 

 type of Typhlocyba of which he placed Empoa as a synonym, T. quercus 

 Fabricius. 



The question as to whether a change of name is called for because of 

 the presence of quercus Fabricius and querci Fitch in the same genus is a 

 nice one. The name quercus was originally given as a noun in apposition 

 however, and will retain this form, its own nominative singular, whatever 

 shifts of genera it may undergo. The name querci, given originally as an 



* These two genera were declared synonymous with each other by Fieber, himself 

 in Katalog der Europaischen Cicadinen, 1872, p. 14. 

 + Kat. Pal. Hemip. 1912, p. 114. 



I These two groups were declared synonymous with each other by Fieber, Katalog, 

 1872, p. 15. 



$ Psyche, V, 1889, p. 212. 



II Kat. Pal. Hemip. 1912, p. 113. 

 IT Check-list, 1916, p. 77. 



** Catalogue. 1917, p. 708. 



tt Fauna British India Rhynchota IV. 1908, p. 409. 



