H24 THE MARaUIS OF TWEEDDALE ON [DeC. 4, 



All the five examjiles 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 tlie mandible. 

 In this respect the North-Mindanao sj)ecies agrees with that of Luzon, 

 B. hydrocorax. One Butuan individual does exhibit a rudimen- 

 tary plate ; and it may be that these plates only mature with age. 

 The rectrices, when first reproduced, are almost white. 



28. Craniorrhinus leucocephalus {^1) 



[Surigao, S ? , May. Iris crimson ; feet dark brown. h. 

 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 6 . 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 (PI. Col. 69). The 

 example ( c?) 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). 



cj . 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 abdo- 

 minal 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. 



5 . 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. 



[Butuan, 6, 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 



