119* BIRBS OF iLlJNOId. 



Seyeral of the above are unquestionably good genera; but 

 having announced my determination- to follow the A. 0. U. 

 classification and nomenclature in this work I am obliged to 

 do so in this case. With the exception of DicJwomcunasaa and 

 JEyel/ranassa (which are related most nearly to Demiegretta, of south- 

 eastern Asia, Polynesia, etc.) and Florida, all the groups are 

 cosmopolitan, being represented in different regions by distinct 

 species, all agreeing minutely in structural characters. Butorides, 

 for example, has, besides the North American species, one in 

 Cuba, another in South America, a third in the Galapagos Archi- 

 pelago, and several others in various parts of the eastern hem- 

 isphere. 



Subgenus Ardea Linn^us. 



Ardta Lnra. S. 17. ed. 10, 1, 17S8. Ul. Type, by ellmjnation, A. cinerea Linn. 



BUBQEN. Chab. Herons of largest size (of Stork-like stature), the adults distinguished 

 by lengthened, narrowly-lanceolate, acute jugular and scapular plumes (the former rather 

 rigid, the latter overhanging the wings and rump) ; a tuft of broad feathers on each side the 

 breast (having a different color from adjacent parts), and, in the breeding season, by the 

 presence of two or three extremely lengthened, narrow, pendant, f coipital plumes. 



Oulmen almost straight; gonys ascending, slightly convex, about equal in length to 

 the mandibular rami ; upper and lower outlines of the bill parallel for tl)e basal half. Uental 

 apex anterior to half-way between point of bill and anterior angle of the eye ; frontal apex 

 a little posterior to the nostrils and a little anterior to the malar apex.* Uiddle toe more 

 than halt the tarsus, and about ecmal to bare portion of tibia; outer toe reaching to about 

 the middle of the. penultimate phalanx of the middle toe; inner toe decidedly shorter. . 

 reaching only to the second articulation of the middle toe ; hallux a little longer than the 

 basal phalanx of the outer toe ; claws rather short, strongly curved. Eront of tarsus with 

 broad, transverse soutellse, in single series, for upper half. Pileum crested, the feathers of 

 the crown and occiput being elongated, lanceolate, and deourved. Primaries reaching de- 

 cidedly beyond tertials. Second, third, and fourth QuiUs nearly eaual, and longest; fiist 

 longer than fifth; inner webs of outer three slightly sinuated near ends. 



, Synopsis of Species. 



a>. Color of plumage entirely pure white. Hah. Southern Florida A. oeeidentalis. 



of. Color of plumage chiefly bluish or grayish. 



6>. Adult with head entirely white, except (usually) blaok or dusky streaks on fore- 

 head, or (rarely), a blackish patch on sides of orovm or pceiput, beneath edge of 

 crest; more white on under parts, edge of wing, etc. Hah. Southern Florida; 



aootdental in southern Illinois A. wuerdemannii. 



5'. Adult with top of h^ad, including oooiprtal plumes, black, with a large white patch 



covering forehead and center of crown; more Usok on lower parts and more 



Tufoud on edge of wing. 



o\ Larger, with legs andfeet yellowish brown or olive-yellowish; total length.about 



atoli inches; wing, 19.50-21.00; exposed oulmen. 5.9(H!.90; tarsus, 7.85-8.40. 



Eai. Florida „ .,^ „ A. wwdi. 



• The terms "mental apex", "malar apex", and "frontal aoex* are here employed to do- 

 note the apices, or points of the feathering of the head at the base of the bill. 



