550 ON THE OENITHOLOGY OF THE PHILIPPINES. [1877. 



25. Centeococctx viridis (G4). 

 [Surigao, 6 , May. Iris red.] 



26. Pykrhocentoe melanops (G5). 



[Butuan, 6 , May. Iris crimson ; bill black ; legs leaden, b. Surigao, d . c. 2 , May. 

 Iris crimson.] 



The sexes, as represented in Mr. Everett's series, wear the same plumage, and are of equal 

 dimensions. 



27. BUCEKOS MINDANENSIS. 



Buceros mindanensis, Tweeddale, P. Z. S. 1877, p. 543. \_A7itea, p. 467.] 

 [Butuan, c? , May. Iris bright yellow; orbital skin blackish, with a yellow streak under 

 the eye ; feet dull coral-red ; claws blackish grey. b. Surigao, d , May. Iris (in the living 

 bird) pale green ; orbital skin sooty black, but yellow just below the eye ; skin of chin yellow ; 

 feet light coral-red ; claws dark brown grey. c. Surigao, ? , May. Iris white ; feet light coral- 

 red ; nails black.] 

 P.Z.S.1S77, All the five examples in a series of that number slightly differ from the type specimens in 



^' ^"^" having the wing-coverts and back tinged with olive, and in the absence of a channelled or grooved 

 plate, or even a distinct smooth plate, on the basal walls of the mandible. In this respect the 

 Korth-Mindanao species agrees with that of Luzon, £. hydrocorax. One Butuan individual does 

 exhibit a rudimentary plate; and it may be that these plates only mature with age. The 

 rectrices, when first reproduced, are almost white. 



28. Cr-^^iorrhinus letjcocephalus (67). 



[Surigao, 6 $ , May. Iris crimson ; feet dark brown, b. Butuan, $ . Iris crimson ; 

 orbital skin, base of the mandible, and bare skin of the chin fiery orange-red ; bill deep red, 

 lateral grooves brown, intermediate plates or spaces whitish, posterior plate dull reddish ; feet 

 dull black.] 



The examples with black body, neck, and head-plumage (5) are all marked ? by Mr. Everett, 

 and those with tawny throats and dark chestnut napes (2) are marked d . This confirms what 

 has been previously stated. The females are slightly smaller, the bill considerably shorter than 

 in the males, and the form of the casque is of a different type. It is not inflated, and is smooth, 

 without any folds. The casque of the female is well delineated by Mr. Srait (Tr. Z. S. ix. t. 27), 

 and that of the male by Huet (PI. Col. 69). The example ( 6 ) figured (/. c.) is a young male. 



29. Penelopides affinis. 



Penelopides affinis, Tweeddale, Ann. & Mag. N. H. ser. 4, vol. xx. p. 534 (December 1, 

 1877). IPostea, p. 562.] 



6 . Like P. panini, but differs in wanting the perpendicular grooves on the thick lateral 

 plates of the maxilla, which are smooth, in the grooves at the base of the mandible not being 

 recurved, but straight, in the whole bill being much less massive, in the abdominal region and 



