J. iiiii iiR-liued to think that, while Cli. ijiyuiitea is the ivsideut t'onu, 

 Ch. indica migrates south in winter, while i>ossil>ly interbreeding also 

 takes place. 



40. CILETUJi.l (OCniNCHIXKySIS-nW. INDO CUI.NKSK SPINE-TAIL SWIFT. 



(Jhsetura c-ochinehiueusis (Oust.); Hurfrrf, Cat., p. 491; id., Ibis, 

 1896, p. 45tl. 



Chaetura kkesii (Buttik.) ; Harkrf, Cat., p. 491 (synonym). 



Somangku I'tiss, 2,7tH) ft. Noveinbcr, liJOU. A. L. Hiiclcr [c]. 

 Ditto, Fehniiiry, liXKS. 



This very distinct species differs from the other large Spine-tail 

 Swifts iu its smaller size, wing 7.0-7.3 in., its smoke-grey throat, 

 dearly differentiated from the rest of the luider parts and in having 

 the centre of the l)ack pale whitish brown. It is by far the most abun- 

 dant sjjecies of its genus on the Semangko Pass, and is also known 

 from Larut, Perak. 



U. I'Jl.ETHi.i LIJVCOl'lOIM.I.s Till; WIlITi: laJIl'Kl) ,^1'INE TAIL SWIFT. 



Cha^tura leucopygialis (Blylh) : Hartnt, Cut., ]>. 490 ; Butler, p. 27. 



V. Sciuuuyko Piiss. 2,7U0 ft. IMuy, 1!»U2. 



Kare iu Selangor or perhaps easily overlooked. The above specimen 

 is the only one in the Selaugor Museum. As noted by Butler, its 

 Hight is not nearly so swift or direct as that of its larger congeners, 

 more resembling that of CoUocalia. 



42. CIPSELUS PACIFICUS-'i'llK L.UIGK WHITE RL.MPLD SWIFT. 



Cypselus pacificus (Lath.) ; Hartert, Cat., p. 448. 



Very common at the Semangko Pass in February, 1908, and 

 also at Kuala Lumjiur di.u-iug rainy, windy weather in October, 1907. 

 Hitherto its occurrence iu the Peninsula has rested on a specimen c^ 

 of the British Museum Catalogue obtained by Cantor in Peuaug. 



4-3. TACHOJiXIS INFUMATA-THTi EASTERN PALM-SWIFT. 



Tachornisinfumata (Sclat. j ; Hartert, Cat., p. 467 ; Grant (1), p. 107. 



Hemaiigko Pass, Selaugor-Pahang boundary, 2.700 fi. February, 1908. 



Fairly common, but not so abundant as the two species of 

 CoUocalia that lly with it. 



41. MAVROl'TElilX LO\OII>E.\XI,S THi: CRESTED TREE SWU'I'. 



Macropteryx longipennis (Ratin.) ; Hartert, Cat., p. 514; Butler, 

 p. 28; Sharpe (3), p. 278 ; Grant (2), p. 47. 



¥ . Bukit Kutu, Ulu Selangor, 3,000 ft. August, 1902. 

 2 ? . Semangko Pass, Selaugor-Pabang boundary, 2,700 ft. February, 1908. 



Ranging as high as 5,000 ft. Macropteryx comata (Tenmi.) has 

 not yet been met with at any elevation on the Selangor main 

 range, though common among the foot hills. 



