16G FALCONIDiE. 



/('. Under surface uniform. 



e" . With 12 bars on penultimate tail-feather (viewed from below). 



galapagensis ad., p. 170. 

 /". Bars on penultimate tail-feather always less than 12. 



a'". General colour sooty black ; tail distinctly barred ; subterminal 



band distinct ohsoletns ad., 184. 



b'". General colour smoky brown ; tail with indistinct cross 

 bands, subterminal one imperceptible. 



jdnmipes ad., p. 180. 

 {. Under surface particoloured. 

 >/". Thig'hs imiform. 



C". Thighs white or buffy white, vmspotted. 



«*. Upper tail-coverts barred or spotted with white ; tail whitish 

 at base. 

 rt\ Bare part of tarsus (measured on imier side) greater than 

 middle toe without claw, 

 rt". Upper breast white, with a few spots only. 

 a'. Throat brown, with narrow white streaks. 



vulgaris juv., p. 18G. 

 b''. Throat quite white, vmiform o6so/e<«<s juv., p. 184. 

 c'. Throat white, with central streak of brown. 



Uneahis'^wY., p. 191. 

 ¥. Upper breast uniform rufous brown. 



obsoletm vix ad. (insig- 

 natus), p. 184. 

 &'. Bare part of tarsus on inner side less than middle toe 



(without claw) plumipes juv. ( ^jajm- 



tiicHs), p. 180. 

 i'. Upper tail-coverts ashy brown like tail, with rufous tips. 



augm- '^xiv., p. 175. 

 d'". Thighs uniform brown externally, sometimes with remains 

 of slight rufescent margins. 

 c*. General colour sooty black or sooty brown ; not more than 

 9 bars on tail to be distinguished, 

 c'. Much larger (length 28 inches). 



c". Throat sooty brown, uniform, fei-ox ad. (fiiliginosus, 



Hume), p. 176. 

 fZ". Throat white, streaked with brown. 



Jietnilasius, p. 182. 

 (P. Smaller ; length not more than 22 inches. 



e". No rufous on tail, except a slight tinge on apical band. 



obsoJetus ad., p. 184. 

 /". Upper tail-coverts and tail washed with rufous. 



desertnrum ad., p. 179. 

 d^. General colour clear brown ; bars on tail from 10 to 13. 

 e^. Bars equidi«tant on tail, which is not washed with rufous ; 

 upper tail-coverts not washed vsdth rufous. 

 g^. Under tail-coverts white, with a few longitudinal 



streaksor spots of lightbrown. r?</^am ad., p. 186. 

 /*". Under tail-coverts white, with broad bars or arrow-head 



spots of dark brown ohsoletns ad., p. 184. 



/■'. Bars on tail not equidistant throughout, the subterminal 

 one broader ; tail washed with rufous. 

 i". Bare part of tarsus on inner side greater than middle 

 toe without claw. 

 it'. Upper tail-coverts not spotted vdth rufous. 



