40 BIRDS. 



hhh. Bill very slender, not strongly notched nor hooked ; 

 small, length 4 to 5. . . Sylviid^, 30. 



.9^. Tail shorter than wings; general color olivaceous; 

 bill stout, notched and hooked ; length ^ to 6i. 



VlREONID^, 31. 



ff. Bill not at all notched. 



i. Rictus with bristles ; quills not barred, the tail longer 



than wings; large, length 9 or more. TuRDiDi^^, 18. 



ii. No rictal bristles ; wings and tail barred or undulated, 



usually about equal in length, the latter of rounded 



feathers ; small, length 6 or less. 



Troglodytid^, 24. 



in. No rictal bristles ; tail about as long as wings, scau- 



sorial, — its feathers rigid and acute, not barred ; bill 



long, decui-ved; length 5 to 6. . Certitude, 23. 



** First primary about as long as second; (the real first one being 



minute and misplaced, leaving only 9 evident). 



X Bill tissirostral, — triangular, depressed, about as wide at base • 



as long; its wide, deep gape twice as long as the culmen, 



reaching to opposite the ej'cs; no rictal bristles; wings 



very long and pointed. . . . Hirundinid^, 29. 



XX Bill tanagrine, — stout, conic, its outlines convex, the tomia 



with one or more lobes or nicks near the middle ; nostrils 



very high ; plumage brilliant, chiefly red {$) or yellow (?). 



Tanagrid/e, 28. 



XXX Bill conirostral, — stout at base, and more or less conic; 

 nostrils high up; tomia more or less e\\(\en\\j angulated 

 near the base {i. e., " corners of mouth drawn downward." ) 



j. Bill truly conic, much shorter than the head, usually 

 notched at tip, or with bristles at the rictus. 



Fringtlltm:, 33. 



jj. Bill conic, but lengthened more or less, about as long as 

 head (except in Dolkhonyx and Molothrus, the Bob-o- 

 link and Cowbird) ; no notch at the tip or bristles at the 



rictus ICTERTD^, 34. 



XXXX Bill not as above, with the tomia straight, or very gently 



curved. 



k. Conspicuously crested; bill triangular, depressed, notched, 



and hooked; tail tipped with yellow; secondaries (in 



full plumage) with red, horny tips. . AMPELiDiE, 30. 



