552 



PROCEEDINGS OP THE NATIONAL MUSEUM. 



VOL. 43. 



season, are, in both size and color, essentially like other examples of 

 the present form from northern Calif ornia, although the first-mentioned 

 bird is slightly paler, as would be natural from an area so near the 

 range of Ardea lierodias treganzai. 



An immature winter example from St. John, Glenn County, Cali- 

 fornia (No. 197862, U.S.N.M.), taken Januaiy 2, 1906, belongs appar- 

 ently to this form; and the breeding bird of the whole Sacramento Val- 

 ley may be the same. Two specimens collected by the United States 

 exploring expedition under Captain Wilkes (Nos. 12670 and 15352, 

 U.S.N.M.) and labeled simply "Oregon " must be referred to the pres- 

 ent form, although rather darker above than birds from northern 

 California. They are somewhat vergent toward Ardea lierodias fannini, 

 and probably came from near the mouth of the Columbia River — at 

 least no farther north — since all the great blue herons we have seen 

 from Washington are Ardea Tierodias fannini. 



Specimens to the number of eight have been seen, from the localities 

 given below: 



California. — Humboldt Bay; St, John; San Diego; Baird; San 

 Gabriel. 



Oregon. — [No further locality specified.] 



Measurements of specimens of Ardea herodias hyperonca. 



Museum and No. 



Sex. 



Lociility. 



Collector. 



AJSI.S.Phila.370881. 



Mus. Vert. Zool. 



18855.1 

 Mus. Vert. Zool. 



17244.1 



Mus. Vert. Zool. 



17243.1 

 U.S.N.M. 1074011 



U.S.N.M. 984861.., 

 U.S.N.M. 197862... 



Zool. 



Mus. Vert, 



4494.1 

 Am. Mus. N 



49448.1 

 U.S.N.M. 12670' 

 U.S.N.M 15352., 

 U.S.N.M. 95116., 



H. 



Male 



...do.... 

 ...do 



...do 



[Male]... 



...do 



Male,juv.< 



Female. . 



Female, 



juv. 

 [Female]. 



San Diego, 

 Cal. 



Monterey 

 Bay, Car.2 



S u i s u n 

 Marshes, 

 Solano 

 Co.,Cal.2 



do.2 



Hum boldt 



Bay, Ca!. 

 Baird, Cal.3. 

 St. John, 



Glenn Co., 



Cal. 

 Sau Diego, 



Cal.2 

 San Gabriel, 



Cal.3 



Oregon 



do 



Dee. 16,1892 

 Sept. 12, 1910 

 Dec. 28,1910 



Dec. 5, 1910 



Dec. 7, 1885 



Mar. 3, 1884 

 Jan. 21,1906 



Apr. 24,1862 

 Sept. 13, 1888 



C.H. Marsh. 

 R. H. Beck.. 



E. H. Cuth- 



bert. 



L. Kellogg.. 



C. H. Town- 

 send. 



do 



J. H. Gaut.. 



J. G. Cooper. 



E. C. Thur- 

 ber. 



Baird, Cal. . 



Nov. 1,1883 



T. R. Peale , 

 C. H. Town- 

 send. 



mm 

 109 



1113.2 

 1111.3 



1111. 

 ;119 



!110 

 115 



1 109. 6 



94 

 104 

 103 



1 Used in measurement averages on p. 551. 



* Not seen; measured by Mr. Joseph Grinnell. 

 'Type. 



* Probably a female. 



