( "if'S ) TI. LIST (_»F THE FIRST COLLECTION OF BIRDS FROM THE NATUNA ISLANDS. By ERNST IIARTERT. In the followiiitr j)a,u'es I give an account of the first collection of hinls from the Natnna Islands, made iu September on Sirhassen Island, and at the end of September and in October 1893, on Bnnguran Island, by Mr. A. Everett. In order to understand the geographical relations of the birds of the Natnnas, I shall give in short the distribution of all the resident species, at least, whether they are of the Malay Peninsula, or of Borneo, or e.xtend over both these countries. I have in ever// case actually compared our Natuna specimens with a series ot birds of the same species from other localities, and where the material at Tring did not seem to be sufficient, I have compared it with the material in the British Museum. My thanks are due to my friend Mr. Sharpe and his attendants for their help in looking up the re([uired species, and other acts of courtesy, which enabled me to finish my work in the British Museum in a very short time. I. Monticola cyanus solitaria (P. L. S. Mull.). A single /rw/c'/tf of the Eastern Bine Rock Thrush, or more likely of the inter-mediate forms between the Eastern and Western form, from Bnnguran. ,. Cittocincla macrura (Gm.;. Adult males, females, and immature birds from Bnnguran. They belong to the continental C. macrura and not to the Bornean C. smicis Scl. This latter firm seems to be in some way connected with C. macri<rri from the continent, through the dark females in South Tenasserim and Malacca, but they show constantly more white in the lateral tail-feathers. They may, perhaps, conveniently be treated sub-s[)ecifically (see Sharpe, Cat. B., vii., jip. ST and 88). "Iris dark brown: bill black: legs pale flesh colour; nails horn brown" (A. Everett). 3. Phylloscopus borealis (Bias.). Eight specimens from Bnnguran, Octi'bir '.ith to October l!)th (winter visitor). 4. Locustella certhiola (Piill.). One adnlt wale from Sirhassen, September 'SixA (winter visitor). ■J. Orthotomus ruficeps (Less.). Five males and females from Sirhassen (Malay Peninsula, Sumatra, Borneo, and Palawan). Fully adnlt birds have the tail-feathers chestnut rufous with the centres blackish brown near the base, while immature sjiecimeus have them brown with pale tips and a broad blackish subterminal bar. 0. Orthotomus atrigularis Temm. Si.x males and as mnuy females from Bnnguran. The females all want the black throat stripes that characterise the male, and the chestnut red colour of the
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