1918. | H. C. Rosinson & C. B. Koss: Birds. 177 
Much confusion has surrounded this species which, by 
many authors, has been confounded with H. malaccensts from 
the Malay Peninsula, a totally distinct form, differing in its very 
much larger size, wing about 104 against 87 mm., and in its 
much whiter lower surface, the belly having no tinge of yellow, 
while the feathers of the breast are white, edged with greyish 
brown, instead of ochreous brown, with shaft stripes of white. 
Salomon Miller utilized the specific name striolata for two 
species, of which one is the present species, while the second 
is a Thringorhina (c. f. postea). 
Buttikofer however (Notes Leyden Museum, xxi, p. 226) 
categorically states that ‘‘ all our Sumatran specimens in the 
Leyden Museum, with the inclusion of the types of Tvichophorus 
stviolatus certainly belong to this latter species, H. malaccensis, 
as they cannot be distinguished from Malaccan and Bornean 
specimens,” and in face of this, we have no option but 
to regard T. strtolata described in 1850 as a pure Synonym 
of H. malaccensis described in 3845, though Bonaparte’s 
epithet of “‘ nigricans” hardly fits the bird. 
Both Hemixus mulaccensis and H. sumatranus therefore 
occur on Mt. Singgalang, while H. malaccensts occurs to the 
North of Korinchi Peak, and H. swmatranus to the south of it 
in the Lampong district and also north in the Batak Lands. 
- But for the fact that Klaesi’s birds are H. malaccensis one might 
suspect erroneous labelling of the types of H. striolata. 
Microtarsus melanoleucus, Fyton. 
Microtarsus melanoleucus, Eyton, P.Z.S. 1889, p. 102; 
Vorderman, Nat. Tijd. Nederl. Ind. xlix, p. 403, no. 262 (1889). 
Micropus melanoleucus (Eyton,) Sharpe, Cat. Birds Brit. 
Mus. vi, p. 69 (1881); Buttikofer, Notes Leyden Mus. 1x, 
p-. 63 (1887). 
a 1 g. Pasir Ganting, West Sumatran Coast. 
Lat. 2°S. 19th June, 1914. [No. 2034.] 
“Tris red, bill and feet slaty black.” 
103. Gymnocrotaphus tygus (Bp.). 
Pycnonotus tygus, Sharpe, tom. cit. p. 156. 
Gymnocrotaphus tygus, Buttikofer, Notes Leyden Mus. xvul, 
P- 245 (1896). 
a-d. 36,2. Siolak Daras, Korinchi Valley, Sumatra, 
3,000 feet. 17th-27th March. [Nos. 194, 
252, 269, 467. | 
“Tris hazel, orbital skin dark greenish black, bill black; 
feet brownish, slaty black or black.” 
_The characters cited by Buttikofer, especially the naked 
orbital region, appear sufficient to separate this species 
generically from Pycnonotus. We have nothing special to note 
Part Il: Vertebrata. 13 
