64 | 
F. Bill conoid; if compressed the tip slightly hooked, and if 
slender with a notch on upper cutting edge near tip, or the 
GU: BOWE: Aoc, Wor, oe ck Keen, oe ae ola Ie Sane ee] 
F. Bill slender; if deep the culmen much curved, and if ap- 
proaching conoid the corners of the mouth not turned 
downward . Hey eerie oeiie aR N SRI a ee 
G. Tertials nearly as gay as cfnngere ree Sey en .Motacillide. 
G. Tertials not nearly as long as aia. We .Mniotiltide. 
H. Rictal bristles obsolete; bill not notched Bh ae. . . .Leteridz: 
H. Rictal bristles present; bill notched at tip or uae feather ta (1) 
I. Corners of mouth turned abruptly downward..............Fringillide. 
I. Corners of mouth not turned downward.................. . Tanagride. 
J. Front of tarsus a single continuous plate except at extreme 
DASE 002 wane ee 
J. Front of tarsus ed ee Hareaue eanieet Te aticdat coerced el LRG) 
Kk. Bill very strongly hooked, and toothed near tip............... Laniide. 
Ke Bill notehooked! om binty sliobthys SO} jn. e erence eaercueecror iors een teeter (L) 
L. Tarsus not longer than middle toe with claw, bill short, de- 
joie sts(=| 210 AARNE hors Sra yy eta RANMA SO hh wh ic Ampelide. 
L. Tarsus longer than middle toe with claw, or else bill elongated, 
not depressed... ... co Sele pigennigel tag aires .(M) 
M. Tail feathers stiff and pouted BY Pe SE RP AGT EOS See td 6 Ghee 
M. Tail feathers not stiff nor especially pointed. ...................0...(N) 
N. Nasal feathers erect, not covering the coapeilee i Sasi Re eee cee Ay) 
N. Nasal feathers directed forward, usually covering the nostrils. . (R) 
O.cHind toelonger than ouber (oe. has: <2 acsseiaoe melee Troglodytide. 
O. Hind toe not longer than outer toe........ CBP) 
P. Basal joint of middle toe hia to lateral “eee Vireonide: (pt.) 
P. Basal joint of middle toe mostly free from eo LOGS 4 seer (Q) 
Q. Wing under 24 inches Sylviidz (Polioptiline)—over 34 inches. .Mimide. 
R. Hind toe longer than outer toe, its claw large............Sittide 
R. Hind toe not distinctly longer than outer toe................(S) 
S. Wing under 4 inches Paridze—over 4 inches........:......... Corvide. 
T. Without rictal bristles; nostrils linear; tail very short. .Cinclide. 
T. With distinct rictal bristles; nostrils oval; tail normal........(U) 
U. Wing under 3 inches Sylviide (Sylviine, Regulinsz)—over 3 inches 
..Turdide. 
Famity TYRANNIDA—FtycartcHeErs 
1. Tail very long, over 7 inches, forked for 4 its length; ashy, with 
scarlet sides... <, 5). fear Se. .Scissor-tailed Flycatcher. 
1. Tail shorter, under 5 rahe opie slightly Hee On SdUarcee, ner (2) 
2.. Larger, wing.3+ to/5 inches lone. \.6). vcs at ck soe ee SD 
2. Smaller, wing 3+ or less, down to O41 Piecant tekehaene Fi ne 8 Beat Ane (12) 
3. Crown with a concealed orange patch (4)—without a bright colored 
NFAGCH ies. oS Sadie aye G Sue Bea bc RR ae a es ee (6) 
