notes on sikhim birds. 221 



Notes on the foregoing List of Sikhim Birds, 

 by l. a. waddell, f.l.s. 



3 bis. Gyps flllvescens (Hume).— This fine bird, a male, in 

 October plumage, answers generally to the description of this species, 

 but it differs in several details. The ruff is pale earthy-grey, more 

 rufous on the mantle and interscapulars. Feathers of the back are 

 not pale-centred. The rump is dark bronzy-brown, like the wings, 

 only the lateral feathers being centred. No white patch on the back. 

 Third primary is longest. Beneath, from the breast, darker, especi- 

 ally towards the vent and flanks, where the feathers have dark brown 

 centres. The tail feathers have a subterminal broad whitish bar 

 slightly mottled with brown. Length 36*5 inches, wings 2-4"7, tail 

 12'2, bill length (straight) from front of cere 2'05, breadth at gape 

 r7, depth at cere 1'35, length of cere above 0*7, claw of raidtoe 

 (straight) 1-25. 



17. Cerchneis tinnunculus.— Bill bluish-grey, greenish- 

 yellow at base, and black at tip. Cere greenish-yellow. Feet ochrey. 

 Claws blackish. Forehead greyish-rufous rather than yellowish. 



20 Hierax CSerulescens. — Bill horny-black with greenish- 

 yellow base. Legs dark green. Claws black. Chin, vent, thigh, and 

 under tail coverts dark ferruginous. 



23. Astur badius. — The adults have the rufous demi-collar 

 broad and well marked. 



27. Aquila nepalensis.— A female in January. Length 

 31 '3. Wing 23*2, and they reach to 2'6 from end of tail. The tail has 

 no black subterminal band, nor have the shoulders, scapulars, wings, 

 or under- surface any white spots or bars. 



33. Nisaetus fasciatUS. — Young male in January. Length 

 24'4. It has the lower part of forehead almost pure white. Chin, 

 throat, and breast are much darker than abdomen, owing to the 

 feathers, which are wliite at their bases, having mesial dark brown 

 streaks with fulvous centring which becomes larger and more rufous 

 on the breast. 



36. LimnaetUS nepalensis.— Male in January. Length 26"4. 

 Crest 4*95. Claw of midtoe (straight) I'l. Inner lining of wings 

 light rufous-brown mostly with dark brown centres. 'l"he whitish 

 spots on breast are in transverse series as inturrupted bars. Rump 

 uniform hair-brown except at flanks, which as well as the uppermost 

 of the under tail coverts are barred whitish. 



37. L. kienierii. — This extremely beautiful bird varies 

 considerably from Jerdon's description. A male in April measures 



