4. HYDROCORAX. 359 



in places, the latter edged on both webs with buff ; primaries and 

 rest of ^secondaries black, the latter with a narrow edge of buff on 

 the outer web; thighs rufous; crissum and under tail-coverts 

 bright buff; tail white, but frequently discoloured so as to appear 

 pale buff ; the entire casque and bill are blood-red : " naked skin 

 round eye yellow ; iris red ; feet brownish-red ; nails black " {A. 11. 

 Everett). Total length 37 inches, wing IG, tail 12-7, tarsus 2'6. 



Adult female. Similar to the male. Total length 3G inches, 

 wing 15, tail 11*6, tarsus 2-2. 



Young. Cheeks and upj^er parts of head blackish ; rest of head 

 and neck, rump, thighs, crissum, and under tail-coverts yellowish 

 white mixed with rufous ; breast and belly yellowish white mixed 

 with blackish grej' ; back, wing-coverts, scapulars, and outer secon- 

 daries reddish brown, the wing-coverts tipped and the scapulars and 

 secondaries margined with buff; primaries and rest of secondaries 

 brownish black, margined on the outer web and tipjted with buff; 

 basal two-thirds of tail-feathers reddish browu, margined in all 

 except the middle pair with black ; bill and casque dark black, 

 except the base of the lower mandible and the extreme tip of the 

 bill, which are blood-red. 



llab. LuzoH, Marinduque ; Philippine Islands. 



a, b. ij ad. sk. Monte Alban, Luzon, March Tweeddale Coll. 



(A. H. Everett). 

 c-e. (S 2 ad. et Luzon, Feb., April {A. B. Tweeddale Coll. 



imm. sk. Meyer). 



y-A. Ad. et inim. st. Philippines. H.Cuming, Esq. [P.]. 



2. Hydrocorax mindanensis. 



Bnceros mindaueusis, Tweeddale, P. Z. S. 1877, pp. 54.3 & 823 ; ibid. 



1878, p. 278, tigs. 1 & 2, & p. 946, & 1879, p. 70 ; Sclater, Chall. p. 15, 



pi. iii. (1880) ; Steere, Lid Birds Sf Mamm. P/iilipjti/ies, p. 13 



(1890). 

 Hydrocorax mindanensis, Elliot, Monogr. Bueerot. pi. viii. [text] 



(1880). 

 Bucevos (Hydrocorax) hvdrocorax, var. mindanensis, Dubois, Bull. 



Mus. Bel(j. iii. p. 196 (1884). 



Adtilt male. The plumage docs not differ from that of //. hijdro- 

 cora.v, and the only differences between the two besides the some- 

 what smaller size of the present species lie in the shape of the 

 casque, which is only three-quarters as wide as that of //. liydro- 

 cora.v, and the colour of the bill, of which two-thirds of the maxilla 

 and three-quarters of the mandible are white anteriorly ; naked 

 skin round eye sooty black, yellow just below the eye, gular skin 

 yellow; iris light yellow (light green in living bird); feet coral- 

 red: nails dark brownish grey {A. H. Everett). Total length 31 

 inches, wing 15-4, tail 12-4, tarsus 2-2. 



Adult femnle. Does not differ from the male. Total length 31 

 inches, wing 14'6, tail 11-5, tarsus 2"2. 



Young. Upper part of head and cheeks black ; feathers on chin 



