30 bulletin: museum of comparative zoology. 



Annotated list of species 

 Ardeidae. . 

 1. Ardea cocoi Linne. 



Five specimens, both sexes, adult and immature, Braamspunt, and 

 Vicinity of Paramaribo, February, July, and August. 



2, Egretta egretta (Gmelin). 

 Three specimens, Tijgerbank, September. 



3. Florida caerulea (Linne). 



Two specimens, cf and 9 , Braamspunt, February, and July. 



4. Hydranassa tricolor tricolor (P. L. S. Miiller). 

 One 9 , Fort Nieuw Amsterdam, November. 



5. DoRiPONUs agami (Gmelin). 

 One specimen. Vicinity of Paramaribo, March. 



6. Nycticorax nycticorax naevius (Boddaert). 



Seven specimens, adult and immature. Vicinity of Paramaribo, 

 February, May, and December. 



The South American bird averages a little smaller than the North 

 American. After measuring much material, however, the difference 

 does not seem to be sufficiently great or sufficiently constant to justify 

 using the name Nycticorax nycticorax discors (Nuttall) for the slightly 

 larger North American bird. 



