40 BIRDS. 



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

 small, length 4 to 5. . . SYLVIID.E, 20. 

 gg. Tail shorter than wings ; general color olivaceous ; 

 bill stout, notched and hooked ; length 4 to 6i. 



VIREONKLE, 31. 

 ff. Bill not at all notched. 



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



than wings ; large, length 9 or more. TURDID^E, 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. 



TROGLODYTUX^E, 24. 



Hi. No rictal bristles ; tail about as long as wings, scan- 



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



long, decurved; length 5 to 6. . CERTHIID.E, 23. 



** Primaries 9 ; the first about as long as second. 



J Bill fissirostral, triangular, depressed, about as wide at base 



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



reaching to opposite the eyes; no rictal bristles; wings 



very long and pointed. . . . HTRUNDINID^E, 29. 



ft Bill tanagrine, stout, conic, its outlines convex, the tornia 



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



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



TANAGRID.E, 28. 



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



nostrils high up ; tomia more or less evidently 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. 



FRINGILLTIXE, 33. 



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

 head (except in Dolichonyx and Molothrus, the Bob-c- 

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



rictus ICTERID^E, 34. 



\\\\ 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. . AMPELID^, 30. 



