244 BULLETIN UNITED STATES GEOLOGICAL SURVEY. 



tata, Briss. Av. 5, 396, t. 3o ; Alb. Av. i. 59, t. G7).— Scopou, Ann. i. 1769, n. 



117.— Kram. Elench. 1756, 346, n. 4.— Frisch, Zool. Deutschl. 1739-63, 199.— 



Gmel. S. N. ii. 1788, 627. 

 Ardea cineracea, Brehm, Vo;^. Deutschl. 1831,580. 



Ardca rhenana, Sander. Naturf. xiii. , 195. 



Heron, Bewick, Brit. Birds, ii. 1804, 37, fig. 



Hab. — Pala3arctic Eegion in general, excepting extreme northern por- 

 tions. Accidental in South Greenland {Fabr. I. c; Bernhardt, I. c; New- 

 ton, I. c); India {Auct.) ; Australia {Auci.). 



Adult. — Forehead and centre of pileum pure white ; sides of crown 

 and occipital plumes deep black ; rest of head wholly white. Neck 

 light cinereous, with a very faint lavender tinge, gradually fading into 

 the white of the head ; the front part with a narrow longitudinal series 

 of black dashes on a white ground. Upper parts bluish-gray, the pen- 

 icillate plumes of the back and scapulars much lighter or pale pearl- 

 gray. Border of the wing pure white ; antaxillar tufts deep blue-black. 

 Sides and flanks uniform pale blue-gray. Medial lower parts w^hite, 

 heavily striped laterally with blue-black. Tibiae and crissum pure 

 white. 



Wing, 18.50; tail, 8.00; culmen, 4.80; depth of bill through middle 

 of nostril, 0.85 ; bare tibia, 3.25 ; tarsus, 6.25 ; middle toe, 3.80. [No. 

 57006; Europe.] 



Juv. — Pileum deep ash-gray ; occipital plumes black. Neck ash- 

 gray, the front with a narrow longitudinal series of black and rufous 

 dashes, mixed with white, the former predominating. Upper parts 

 uniform slate-gray, destitute of penicillate plumes. Malar region, chin, 

 and throat white. Antaxillar tufts white, tipped with a rusty tinge. 

 Edge of the wing and entire lower parts wholly white, tinged with bufl". 

 [No. 57007 ; Karope.] 



Bemarlcs. — The above list of synonyms of this common European 

 species is not so complete as might be ; but since it claims a place in the 

 American fauna solely on account of its accidental occurrence in Green- 

 land, enough references are given to answer the present purpose. The 

 descriptions are taken from European examples, the only ones in the 



National collection. 



List of specimens examined. 



The Great Cocoi Heron. 



Cocoi, Marcgr. Hist. Bras. 1648, 209.— Wi'llugh. Orn. 1678-, 284, pi. li.— PisoN, Bras. 



— -, 89.— Ray, Synop. Av. 1710, 100, n. 15.— Lath. Synop. iii. i. 1785, 98, n. 71. 

 Blue Heron, Alsin, Nat. Hist. Birds, 1738, iii. t. 79 (fide Gmel.). 

 Ardea ccerulescens, Albin, t. c. 32, t. 79 (Me Linn.).— Vieill. Nouv. Diet. xiv. 1817, 413 



(based on H4ron plomM, Azara). 

 Ardea cayennensis cristata, Briss. Orn. Y. 17Q0, iOO, la, Z. 

 Lo H4ron hup4 du Cayenne, Briss. I. c. 

 Le Soco, Buff- Ois. vii. 1770-86, 379. 



