166 LABID^. 



Adult (Dalrymple Kock, Chatham I., Galapagos ; January). At 

 the base of the upper mandible a white band of about 0"3 inch wide ; 

 the rest of the head and the neck sooty black, dark and sharply 

 defined on the throat, but passing on the upper neck into the paler 

 smoke-grey of the mantle ; parapteral feathers narrowly edged with 

 white ; edge of wing from the carpal joint and the greater part of the 

 secondaries white, the long inner secondaries grey ; the four outer 

 primaries black on both sides of their shafts, but the greater part of 

 the inner webs white ; the fifth and sixth primaries black on the 

 terminal portion only, the extreme tips white; the upper quills 

 greyish white ; tail and underparts white : bill chiefly black, the- 

 terminal third yellowish horn-colour, the upper mandible decurved ; 

 " eyelids orange-red, iris carmine ; tarsi and toes deep red " (Ridg- 

 ivay). Total length about 20 inches, culmen 2-25, wing 16-25^ 

 tail 7*75, depth of fork 3, tarsus 1"95, middle toe with claw 2-15. 



In the type specimen in the Paris Museum there is more grey on 

 the upper breast, and this appears to be also the case in the 

 pair of birds obtained at Chatham I. in April 1888, described by 

 Mr. Eidgway. It is not improbable that this is the real breeding- 

 plumage, and that the specimen in the British Museum is 

 approaching its moult, for the flight-feathers are somewhat abraded, 

 and there are slight indications of white at the base of the under 

 mandible, 



Toung (tJ. Paracas Bay, Peru; Oct. 1881). Head white, with 

 pale brown streaks on the lores, and darker confluent markings in 

 front of and round the eyes ; a clove-brown patch on the auricular ; 

 feathers of the neck and mantle broadly barred with ash- to umber- 

 brown and tipped with white ; the long inner secondaries with 

 brown centres and with some grey on the outer webs ; the other 

 secondaries and the wing upwards to the carpal joint white ; pri- 

 maries as in the adult ; rump grey, mottled with brown ; tail- 

 feathers white, broadly banded with brown (except the outer pair, 

 which have merely brown tips) and all of them edged with white ; 

 underparts white : biU blackish, the lower mandible dark horn- 

 colour ; iris brown ; tarsi and toes clay-brown (probably flesh- 

 colour in the living bird). 



Hob. Chatham Island, Galapagos group (head-quarters) ; once at 

 Paracas Bay, in about 14° S. lat., Peru. The type, in the Paris 

 Museum, was obtained during the voyage of the French corvette 

 ' Venus,' and is ascribed by Neboux to Monterey, California, where 

 the species has been vainly sought for more than forty years. The 

 fact that the ' Venus ' also visited the Galapagos is not devoid of 

 significance. 



a. Ad. st. Dalrymple Rock, Chatham Capt. Kellett, C.B., & 



Island, Galapagos, 11th- Lt. Wood, Il.N. [P.]. 



16th Jan. 



b. (S juv. sk. Paracas Bay, Peru, Oct. H. Saunders Coll. 



{Adml. A. R. Markham.) 



