1877.] THE ISLAND OF LUZON. 523 



54. Calobates melanopk (115). 



[Monte Alban. a, <s : iris brown ; bill light Vandyke brown ; legs and feet pale transparent 

 brown; nails Vandyke brown, b, ?: iris brown; bill dark lead-grey; legs pale transparent 

 brownish grey, c, $ : iris brown ; bill dark brownish grey ; legs very pale clear brown ; claws 

 Vandyke.] 



Average length of rectrices in five examples, o'87. 



55. MOTACILLA OCULARIS. 



Motacilla ocularis, Swinhoe, Ibis, 1860, p. 55; P. Z. S. 1870, pp. 129, 130, woodcuts. 



[Monte Alban. ? , March : iris, bill, and legs dark brown.] 



A single example with a grey back, a few dark feathers on the vertex, and a black pectoral 

 plastron ; forehead and a broad space over the eye white ; a line passing from base of bill through 

 the eye black. 



56. DIC..EUM RUBEIVENTER. 



P.Z.S.1877, 

 Pipra papue7isis, Gm. S. N. i. p. 1004. no. 21 (1788). P- 698. 



Licwiim rubriventer. Lesson, Tr. p. 303 (1831). 



Dicmim retrocinctum, Gould, B. As. xxvii. t. — , inf ; Walden, t. c. no. 120. partim ; conf 



Salvador!, Ann. Mus. Civ. Genoa, viii. p. 509. 



[Monte Alban. 6 : iris bright brown ; bill glossy black ; legs and nails dark brown.] 

 Not to be distinguished from Zebu examples. 



57. DiciEUM XANTHOPTGiUM. (Plate LXXIII. fig. 1, in orig.) 



Bicceum xanthopygium, Tweeddale, Ann. & M. N. H. ser. 4, vol. xx. p. 96 (1877) *. 

 <S . Above, cheeks and wing-coverts dark bluish slate-grey. An isolated dorsal patch 

 crimson. Uropygium yeUow. Chin, throat, and upper part of breast yellow. Eemainder of 

 breast, abdomen, and flanks orange. Ventral region, thigh- coverts, and under tail-coverts yellow 

 tinged with green. Eectrices and quills dark brown ; the primaries narrowly margined with 

 white, the secondaries with olive-green. 



Wing 1'96 inch, tail 1'06, tarsus 0'50, culmen 0*38. 



[Monte Alban. s : iris dark brown ; legs dark greyish-brown ; bill black.] 



This is a second Philippine representative form of B. trigonostigma, and, as an example of 

 progress in the variation of a species, is interesting. It, together with B. dorsale, Sharpe, and 

 the Malayan species form a small subgroup, the Luzon bird being hardly distinguishable from 

 B. trigonosfigma, as seen from above, and from the Panay species when seen from below. Is the 

 Negros habitat of B. trigonostigma of Mr. Sharpe's list {t. c. p. 352. no. 171) reliable'? 



58. Myz.'Lnthe pygm^a (121). 



[Monte Alban. a, d : iris dark brown ; bill and legs black, b, d : testes greatly en- 

 larged.] 



* [Anted, p. 510 — Ed.] 



