806 PROCEEDINGS OF THE NATIONAL AfUSEUM. vouxxiv. 
(/. Upper parts more ochraceous. 
b. Paler, more ochraceons al)Ove ililnfd ( p. S77) . 
b\ Darker, more ))ro\vnish a) )ove oreodrama ( p. S7(>) . 
2. Black of jugulum separated from black ear-coverts 
by a white or yellow interspace. 
A. Throat always white. 
a. Wing averaging over 115 mm. 
h. Wing averaging under 120 mm elirefii (p. 868 
/*'. Wing averaging over 120 mm. 
c. Back darker, sharply contrasted with nape lotn/lro^itria (p. 867 
c\ Back i)aler, not sharply contrasted with naj^e. 
(I. Ui)per surface darker, more rufescent perlssa (p. 869 
(J\ Upi»er surface paler, more buffy argalen ( p. 871 
a'. Wing averaging under 115 mm. 
h. Back heavily streaked with dark brown (ircticoln ( p. 81 <! 
b'. Back not heavily streaked with dark bn^wn. 
r. More ochraceons above; wing over 105 nun tttbirica (p. 872 
c/. More rufescent above; wing under 105 mm bUopha (p. 873 
B. Throat usually yellow or yellowish. 
a. Wing averaging over 109 nun. 
b. Back paler; horns long ailas (]». 866 
//. Back darker; horns of moderate length. 
c. Eyebrow white; throat pale yellow hoyll (p. 812 
(■'. Eyebrow yellow; throat rich yellow alpestris (p. 807 
f/. Wing averaging under 109 nun. 
b. Wing averaging under 100 mm. 
c. Nape not decidedly rufescent. 
d. Back dark grayish brown giratidi ( p. 831 
rF. Back dark ochraceons brown diaphont ( j). 807 
('/. Na])e decidedly rufescent. 
d. Back not sharply contrasted with nape. 
e. Larger; nape more reddish rid>ea (p. 851 
e^. Smaller; nape more vinaceous .oaxacn' p. 854 
(F. Back sharply contrasted with nape. 
e. Back brownish. 
/. Paler, nape more cinnamomeous (inniKipliihi (p. 849 
f. Darker, nape more vinaceous arlia ( p. 845 
e'. Back blackish. 
f. Wing averaging under 95 mm peirgrinu (p. 841 
Z'. Wing averaging over 95 mm. 
g. Nape darker; no yellow below 
black jugular crescent iiifiu/iirls ( p. 8.39 
f/. Nape lighter; yellow extending 
Ijelow black jugular crescent utrigalit ( p. s.37 
b'. Wing averaging over 100 mm. 
c. Back little if any darker than nape, slightly or not 
at all streaked with blackish or dark brown. 
(/. Wing over 105 nun occl<b')itidit< ( ]>. 855 
d''. Wing under 105 nnu. 
e. Nape and occi]nit more pinkish. 
/. Upper parts mui-h paler .Icitcam^ipdhi ( ]>. 864 
f. Upper parts niu(;h darker (iphraMa (p. 860 
e'. Nape and occiput more cinnamomeous. 
f. Back reddish cinnamon adusta (p. 858 
/'. Back pale ochraceous brown pallida (p. 863 
