GENERA AND SUBGENERA OF BEES—SANDHOUSE 575 
Mydrosoma F.. SmiruH. 
Descriptions of new species of Hymenoptera ... British Museum, p. 5, 
1879. 
Type.—Mydrosoma metallicum F. Smity, 1879. (Monobasic.) 
Nannotrigona COCKERELL. 
Proc. U. S. Nat. Mus., vol. 60, art. 2413, p. 9, 1922. 
Type.—Melipona testaceicornis LEPELETIER, 1836. (Monobasic and original 
designation.) 
Navicularia MEHELY. 
Naturgeschichte der Urbienen, pp. 34 and 140, 1935. Ten species. 
Proposed as a subgenus of Prosopis Fabricius but invalid under Article 25c¢ 
of the International Rules of Zoological Nomenclature, since no genotype 
was designated. 
Navicularia Popov. 
Compt. Rend. (Doklady) Acad. Sci. U. R. 8S. S., new ser., vol. 25, p. 168, 1939. 
Type.—(Mellinus) Prosopis variegata (Fasrictus), 1798. (Monobasic and 
original designation. ) 
Proposed as a subgenus of Prosopis Fabricius. 
Navicularia was first proposed by Méhely, Naturgeschichte der Urbienen, 
pp. 84 and 140, 1935, as a subgenus of Prosopis Fabricius to include ten 
species, but under Article 25c it has no validity from that date since no 
genotype was designated. 
Nectarodiaeta HoLMBERG. 
Bol. Acad. Nac. Ciene. Cordoba, vol. 10, p. 225, 1887. Nomen nudum. 
Anal. Mus. Nac. Buenos Aires, ser. 3, vol. 2, p. 420, 1908. One species. 
Type.—WNectarodiaeta oliveirae HoLMBERG, 1903. (Monobasic.) 
Neoceratina PERKINS. 
Ann. Mag. Nat. Hist., ser. 8, vol. 9, p. 117, 1912. 
Type.—Neoceratina australensis PERKINS, 1912. (Monobasic.) 
Necchelynia ScHROTTKY. 
Rey. Mus. Paulista, vol. 12, p. 187, 1920. 
Type.—Neochelynia paulista ScuHrotrKy, 1920. (Monobasie and original 
designation. ) 
Neocorynura ScurotrKy (—Cacosoma F. Suit, 1879, not Frtprr, 1874). 
Deutsche Ent. Zeitschr., p. 540, 1910. 
Type.—Cacosoma discolor F. SmiruH, 1879. (Autobasic.) 
Synonym of Rhopalictus Sichel, according to Alfken, Deutsche Ent. Zeitschr., 
p. 147, 1926. 
Neohalictoides VimeRECK. 
Ent. News, vol. 15, p. 261, 1904. 
Type.—(Panurgus) Halictoides maurus (Cresson), 1878. (Monobasic and 
original designation.) 
Neolarra ASHMEAD. 
Bull. Colorado Biol. Assoc., No. 1, p. 8, 1890. 
Type.—Neolarra pruinosa ASHMEAD, 1890. (Monobasic.) 
Neomegachile MITCHELL. 
Trans. Amer. Ent. Soc., vol. 59, pp. 302 and 307, 1934. Six species. 
Type.—Megachile chichimeca Cresson, 1878. (Original designation.) 
Proposed as a subgenus of Megachile Latreille. 
Neopasiphae PERKINS. 
Ann. Mag. Nat. Hist., ser. 8, vol. 9, p. 114, 1912. 
Type.—Neopasiphae mirabilis Perkins, 1912. (Monobasic.) 
