ARDEA. m 



in A. herodias), the forehead and middle of 

 crown 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. Sab. 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). Young : 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. Sab. North America in general, north 

 to Hudson's Bay and Sitka ; south through- 

 out West Indies 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 1 . Adult with occiput and sides of crown black, the 

 forehead and centre of crown pure white (as in 

 A. herodias and A. wardi) ; 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 1 . 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. Sab. South America. 



A. cocoi Linn. Cocoi Heron. 1 



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 Link., S. N. ed. 12, i. 1766, 237. 

 17 



