ARDEA. 129 



in A. herodias), the forehead and middle of 

 CTOwn pure white. Young not essentially 

 different from same stage of A. wuerde- 

 manni? Length about 48.00-54.00, wing 

 20.00-20.50, culmen 6.50-7.00, tarsus 8.50- 

 9.00. Eggs about 2.65 X 1-85. Hab. Western 

 Florida. 



193. A. wardi Eidgw. "Ward's Heron. 



g^. Lower parts black or dusky, broadly striped with 



white (the two colors in nearly equal proportion 



in young, however) ; tarsus not more than 8.00 ; 



legs and feet black in adult. 



Adult: Occiput and sides of crown black; fore- 

 head and centre of crown pure white (exactly 

 as in A. wardi). Youtig : Whole top of head 

 dusky, some of the feathers with paler shaft- 

 streaks ; wing-coverts without white spots or 

 distinct rufous spots. Length about 42.00- 

 50.00, wing 17.90-19.85, culmen 4.30-6.25, 

 tarsus 6.00-8.00. Eggs 3-6, about 2.50 X 

 1.50. Hab. North America in general, north 

 to Hudson's Bay and Sitka ; south thi'ough- 

 out West Lidies and Middle America, and as 

 far as Colombia and Venezuela ; Galapagos ? ; 

 Bermudas. 

 194. A. herodias Linn. Great Blue Heron. 

 p. Thighs and edge of wing white. 



g\ Adult with occiput and sides of crown black, the 

 forehead and centre of crown pure white (as in 

 A. herodias and A. icardi) ; neck ash-gray ; length 

 about 37.00, wing about 18.50, culmen 4.80, tarsus 

 6.00-6.25. Eggs 2.40 X 1-71. Sab. Northern 

 portion of eastern hemisphere; accidental in 

 southern Greenland. 



195. A. cinerea Linn. European Blue Heron. 

 g"^. Adult with entire top of head black ; neck pure 

 white ; wing 18.50-20.00, culmen 5.85-6.75, tarsus 

 7.20-8.00. Hab. South America. 



A. cocoi Linn. Cocoi Heron.^ 



^'. Wing less than 17.00. Adult in nuptial plumage with the scapular 



plumes excessively elongated, reaching far beyond end of tail, 



their shafts thick and stiffened, their webs decomposed ; head 



without crest or plumes, and feathers of lower neck (in Amer- 



1 Ardea cocoi LiNN., S. N. ed. 12, i. 1766, 237. 

 17 



