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Show 824 THE MARQUIS OF TWEEDDALE ON [Dec. 4, 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 North-Mindanao species agrees with that of Luzon, B. 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. CRANIORRHINUS LEUCOCEPHALUS (67) [Surigao, cf 2 > May. Iris crimson; feet dark brown. b. Butuan, 2 • 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 2 by Mr. Everett, and those with tawny throats and dark chestnut napes (2) are marked cf • 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. Smit (Tr. Z. S. ix. t. 27), and that of the male by Huet (Pl. Col. 69). The example (cf ) figured (I. c.) is a young male. 29. PENELOPIDES AFFINIS. Penelopides affinis, Tweeddale, Ann. & Mag. N . H. ser. 4, vol. xx. p. 534 (December 1, 1877). cf. 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 under tail-coverts being of the same colour as the breast, and not rufous, and in the rectrices having a black band at their insertion. 2 -Bill as in the male, and to that extent differs from that of P. panini 2 • The female also differs in having a black band at the base of the rectrices. Wing. Tail. Tarsus. True culmen. in. in. in. in. cf 9*25 900 1-75 3*40 2 8*75 8*37 1*60 3*25 [Butuan, cf, May. Iris crimson; orbital skin, nude portion of chin, and unfeathered part of the rami white; casque, smooth lateral plates of maxilla, and the ungrooved triangular space at base of mandible dark brown; the whole apical part of maxilla from the smooth lateral plates, and of mandible from the grooved base, pale brown; grooves on mandible dark brown ; intermediate smooth spaces |