292 Court, Treganza Blue Heron. [f^^ 



bluish black; under tail coverts pure \\hite; bend of wing bright chestnut 

 mixed with white; upper wing coverts and secondaries bluish becoming 

 darker where they overlap the ends of the primaries; primaries bluish 

 black; under wing and primary' coverts and axillaries bluish; postocu- 

 lar region, chin, cheeks, and throat white gradually changing into pale 

 cinnamon rufous, the median line formed by a distinct row of black, white 

 and bright reddish chestnut brown feathers; breast and abdomen broadly 

 streaked with white; flanks dark bluish slate; thighs deep reddish browTi; 

 bill black. 



Geographical distribution: — Great Salt Lake, Utah, Arizona, Texas, and 

 ■California. 



Measurements of Ardea herodias treganzai. 



Cul- Tar- M. 



■Smithsonian No. Wing. Tail. men. sus. Toe. 



9472 Sacramento Valley, 



Cal. ■ 469.9 178 140 180 109 



11706 9 ad. Fort Clark, Texas Jan. 24, 1898 463.5 171 140 172 102 



125829 9 ad. Mexico, near El Paso, 



Texas Feb. 27, 1892 476.2 172 133 172 101 



131506 9 ad. Fort Lowell, Ariz. Nov. 7, 1893 467.3 178 140 177 105 



133029 9 ad. Colorado River, Monu- 

 ment No. 204. Mar. 22, 1894 469.9 171 142 165 100 



133775 9 ad. Gardiners Lagoon, 



Cal. Apr. 14, 1894 469.9 175 148 165 102 



208756 9 ad. Gt. Salt Lake, Utah Apr. 10, 1907 469 177 135 173 108 



Average Measurements. 



Wing. Tail. Culmen. Tarsus. M. Toe. 



Ardea herodias treganzai 469.5 174.5 139.5 172 104 



Ardea herodias 483.5 178 146 181 108 



Ardea herodias wardi 506 193 169 204 124 



I am indebted to Mr. Treganza for the following field notes. 



Salt Lake City, L'tah. 

 December 4, 1907. 

 Friend Court:- — 



The following is a copy of the field notes on the Ardea herodias and a 

 slight description of the different islands where I have found this species 

 breeding, in this locality, with a series of photographs. 



"White Rock Lsland is an almost solid body of quartz, about 175 feet by 

 100 feet, rising shear out of the water on three sides. Extreme height about 

 25 feet. Located about one-half mile off shore, in a small cove on the north- 

 west end of Antelope Island, Great Salt Lake, Utah. 



White Rock, May 15, 1905. Eight pairs found breeding. Four nests 

 contained yomig; one nest contained both young and eggs; the remaining 

 three nests contained eggs badly incubated. Four other nests were found 

 from which the young had but recently gone. One set of four eggs taken. 



Nests composed of sticks, principally of the sage bush, and placed in a 

 rather loose sort of manner between two points of rocks or small hollows. 

 Little or no difference seems to be made in the composition of the inner 



