1. roDiciPEs. 539 



Adult. General colour above dark brown, largely mixed with 

 chestnut on the sides of the lower back and rump ; the feathers of 

 the back and scapulars rather elongate and pointed, with dark 

 middles, paler margins, and pale sandy tips ; feathers of the fore- 

 head dull brown, those of the crown and occiput considerably 

 lengthened, and of a rich chestnut colour, ti|)ped with dark brown ; 

 feathers of the nape and upper hind-neck similar but shorter ; 

 lower part of the hind-neck dull brown ; sides of the neck nearly 

 pure chestnut, especially on the upper parts ; feathers on the sides 

 of the head behind the eye white, with long narrow black tips ; 

 chin, throat, lower ])art of cheeks, and fore-neck white ; lower 

 part of the fore-neck and rest of the underparts dull rufous, 

 fringed with silvery white, producing a mottled appearance, the 

 rufous being most conspicuous on the sides and flanks, where the 

 feathers are blackish towards the extremity, and conspicuously 

 white towards the base ; primarj^-quills brownish-ash, inclining to 

 whitish on the basal half of the inner web ; outer secondaries 

 brownish-ash on the outer web, white on the inner web and at the 

 tip ; rest of the wing dark brown. The pectination on the hinder 

 margin of the tarsus, especially on the " heel," is very strongly 

 developed, but not more so than in P. flaviatilis or P. rollandi. 

 Total length about 16 inches, culmen from feathers on forehead 

 1-25-1-0, wing 4*3-4'6, tarsus 2-05-2-2, outer toe and claw 2-65- 

 2-8. 



Toung birds differ from the adult in having the general colour 

 of the upper parts much paler and mixed with sandy ; the back of 

 the neck pale whitish rufous ; the chestnut on the top of the head 

 duller and paler, inclining to brownish at the base : the underparts, 

 sides, and flanks white, the outer secondary-quills with the outer as 

 well as the inner webs largely or almost entirely white. 



Hah. Lake Titicaca, South Peru. 



a. Ad. sk. Lake Titicaca, S.Peru, 12,644ft. Gould Coll. (Type 



of the species.) 



b. Ad. sk. Lake Titicaca. Gould Coll. 



c-f. Ad. et Lake Titicaca. Salvin-Godman Coll. 



imm. sk. 



18. Podicipes griseigena. 



? Colymbus vulgaris, Scop. Annus, i. p. 78 (1769). 



Le Jougris, D'Aubent. PI. Enl. ix. pi. 48 [no. 9-31]; Buff. Hid. Nat. 



Ois. viii.p. 241 (1781). 

 Colvnibus fiiisegen;., Bodd. Tabl. PI. Enl. p. 55 (1783) ; Bau, etc. 



J.f.O. 1877, p. .341 [Germany]; Baivd, Brno.^- Bidfjiv. Water-B. 



N. Amer. ii. p. 426 (lb84) ; Itidt/w. Man. N. Am. B. p. 5_(1887). 

 Colymbus subcristatiis, Jacquin, Bcytr. Gesch. Voyel, p. 37, pi. 18 



(1784) ; Gmel. S. iV. i. pt. ii. p. .590 (1788). 

 Red-necked Grebe, Pennant, Arct. Zool. ii. p. 499 (1785) ; Lath. Gen. 



Syn. iii. pt. i. p. 288 (1785); id. Gen. Syn. Suppl. i. p. 260, 



pi. cxviii. (1787) ; id. Gen. Hist. x. p. 27. pi. 166 (1824) ; Yarrell, 



Hist. Brit. B. iii. p. 304 (1843). 



