30 HEKODIONES 



n-. Under tail-coverts lengthened and 

 stiffened to resemble the true rec- 

 trices. 



a?. Black tail-feathers slightly forked, 

 and of about the same length as 

 the white under tail-coverts ; sides 

 of the face and upper throat bare Abdiniia p. 32. 

 b 3 . Black tail-feathers very deeply 

 forked, clearly exceeded in length 

 by the stiffened under tail-coverts ; 

 face and head feathered ; neck 



covered with woolly down Disunra, p. 34. 



b-. Under tail-coverts not stiffened or 

 elongated to resemble the true re- 

 trices. 

 3 . Edges of the mandible meeting 



throughout their length. 

 a 4 . Culmen shorter than the tarsus, 



head and neck feathered Ciconia, p. 37. 



&' Culmen about equal to the tarsus. 



5 . Head and neck feathered; a 



flat frontal plate at the base 



of the bill Epliippiorliynclms, p. 43. 



6 5 . Head and neck bare or with a 

 sparse woolly covering only ; 



no frontal plate Leptoptilits, p. 45. 



Z> 3 . Edges of the mandible not meeting 



in the middle portion of the bill ; 



culrnen distinctly longer than the 



tarsus; head and neck feathered... Anastoinus, p. 41. 



b 1 . Culmen rounded, not ridged ; distinctly 



down-curved at the tip ; crown and 



face naked Pseudotantalus, p. 48. 



b. A distinct basal web between the middle 

 and inner and middle and outer toes 

 respectively ; claw of the middle toe pec- 

 tinated Scopus, p. 51. 



r. A basal web between the middle and outer 

 toe, obsolete between the inner and 

 middle toe ; claw of the middle toe pec- 

 tinated. 

 a 1 . With twelve tail-feathers. 



a''. Naked portion of the tibia equal to 

 or exceeding the inner toe and claw 

 in length. 



3 . Plumage grey above, varied be- 

 neath, large birds with long legs. Ardea, p. 55. 



