^°190?^] Court. Treganza Blue Heron. 291 



itrina Pallas, 1771), it is necessary to find another name for the Barn 

 Owl, for which the earliest available name appears to be Strix 

 alba Scopoli (Ann. I, 1769, p. 2). For those who consider the 

 North American Barn Owl as a subspecies of the European, the 

 name for the American form will be Aluco albus pratincola (Bonap.). 



TREGANZA BLUE HERON. 



BY EDWARD J. COURT. 



Plates V and VI. 



This subspecies has been under my consideration for some time 

 and through Mr. A. O. Treganza, Salt Lake City, Utah, I obtained 

 a specirnen, and I have honored him by naming the species Ardea 

 herodias treganzai, Treganza Blue Heron. 



I wish to express my best thanks to Mr. Harry C. Oberholser, 

 Biological Survey, Agricultural Department, Washington, D. C, 

 who greatly assisted me in describing the subspecies; also to Mr. 

 Robert Ridgway, Smithsonian Institution, who agreed with me 

 that it was a good race; and to Dr. Charles W. Richmond, Smith- 

 sonian Institution, for access to the large and handsome series of 

 Great Blue Herons. 



Ardea herodias treganzai, new subspecies. 



Subspecific characters: — Similar to Ardea herodias herodias, but much 

 paler on the neck and upper oarts; resembling Ardea herodias wardi, 

 but smaller and even paler. 



Type: — 9 adult, No. 208756, Smithsonian Institution, Egg Island, 

 Great Salt Lake, Utah; collected April 10, 1907, by Mr. A. O. Treganza. 



Forehead and crown white; superciliary stripes black, connecting 

 behind with the black crest, middle feathers of which are 183 mm. in length; 

 lores and ear coverts white; sides of neck very pale cinnamon rufous; 

 interscapular and scapular regions pale bluish slate changing to a silver 

 bluish gray towards ends of feathers; rump deep bluish; tail terminally 



