FALCO LABRADORUS. 



(Labrador Falcon.) 

 By H. E. dresser, F.Z.S. &c. 



Falco labradora, And. B. Amer. pi. cxcvi. (1831). 



Falco islandicus, Aud. Orn. Biogr. ii. p. 55.2 (1834, nee Lath.) . 



Falco [Hierofalco] gyrfalco, var. labradora, Ridgway, N.-Am. Birds, iii. p. 117 (1874). 



Hierofalco gyrfalco, Sharpe, Cat. of Accipitres, i. p. 416 (1874, partim nee Linn.). 



Falco labradorus, Aud., Dresser, P. Z. S. 1875, p. 115. 



Figiira unica. 



Audubon ut supra. 



Ad. corpore supra saturate fumoso-nigrofusco, uropygio vis sehistaceo tincto, pileo fere nigro : 

 remigibus nigro-fuscis immaculatis, nee in pogonio interno ut in F. islando conspicue pallidiore 

 notatis : cauda saturate fasco-fumosa vix cervino apicati, sed aliter immaculata : corpore 

 subtiis nigro-fusco, abdomine et corpore imo vix ochrascente cervino notatis : subcaudalibus 

 cervino guttatis : subalaribus et margine alse vix cervino notatis : rostro plumbeo, versus 

 apicera nigricante : iride fusca : pedibus plumbeis. 



Juv. corpore supr^ saturate brunneo, plumis pallidiore marginatis : pileo conspicue albicante cervino 

 striato : remigibus fuscis, in pogonio interno vix cervino marmoratis : rectricibus centralibus 

 fuscis immaculatis, reliquis in pogonio interno ochrascente albido guttatis fascias formantibus : 

 caudi albido apicata : gula alba fusco striata : corpore reliquo subtiis brunneo, conspicue 

 albido et cervino striato et notato : subalaribus fuscis, cervino guttatis. 



Specimen A [adult, Labrador) . — Upper parts uniform dark sooty-brown, unspotted ; head blackish ; 

 lower back and rump slightly washed with a slaty tinge ; upper surface of the wings like the 

 back, but rather darker, and with scarcely perceptible lighter edges to the wing-coverts ; 

 tail uniform dark brown, slightly tipped with buff ; under sui'face of the body dark brown, 

 but rather lighter in shade than the upper parts ; chin and upper throat rather lighter, these 

 and the breast uniform in colour; abdomen, flanks, edge of the wing, and under wing-coverts 

 sparingly marked with pale buff spots or dashes ; inner webs of the primaries very slightly 

 (scarcely perceptibly) marbled with pale buff; under tail-coverts rather boldly marked with 



2 c 2 



