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422 Miller, Genera of Ceryline Kingfishers. [July of Rusties feeding fledglings. This was near a colony of Bronzed Graekles, and it is possible that their previous nests may have been disturbed, but it seems probable that this may have been a second brood. About the middle of July, the Rusty families seem to desert their solitary breeding haunts, and again become gregarious, and are seen in small flocks, flying high overhead, between the lakes, or feeding along their shores, getting ready for their southern mi- gration. Dudley Road, Newton Centre, Mass. THE GENERA OF CERYLINE KINGFISHERS BY WALDRON DEWITT MILLER In a note published in 'The Auk' (1918, p. 352) the writer ad- vocated the union in one genus, Megaceryle, of all the large, con- spicuously crested Ceryline Kingfishers. These had been div- ided by Mr. Ridgway (Birds N. and Mid. America, Pt. VI, 407) into Megaceryle and Streptoceryle. At that time I overlooked the fact that Streptoceryle might be inadmissable on nomenclatural as well as on zoological grounds. I. Nomenclature. In my 'Revision of the Classification of the Kingfishers' (Bull. Amer. Mus. Nat. Hist., XXX, 1912, p. 265) the type of Meg- aceryle Kaup, 1848, was given as M. maxima by subsequent desig- nation of Gray in 1855. The early history of the genus Meg- aceryle is briefly as follows: Megaceryle new subgenus, Kaup, 1848. Contained four species, all of which are still referred to it when the genus is used in the broad sense. "Megaceryle Kaup," Reichenbach, 1851. (Handb. Alced.) The same species given by Kaup, (except that the Asiatic spec-