OTPSELUS. 167 



is probably non-migratoiy, and has been obtained in Sind and 

 Baluchistan. 



1071. Cypselus pacificus. The Larfje White-rumped Swift. 



Hirundo pacifica, Latham, Ind. Orn. Suppl. p. Iviii (1801). 

 Cypselus vittatus, Janl. ^- Selbij, III. Orn. iv. pi. 39 (1840) ; Blyt\ 



Cat. p. 85 ; Horsf. Sf M. Cat. i, p. 385 ; Blyth, Ibis, 1863, p. 369. 

 Cypselus pacificus, Bb/th, J. A. 8. B. xiv, pp. 212, 548 ; Jerdon, 



Ibis, 1871, p. 355; Hume ^ Oates, S. F. iii, p. 43; Blyth Sf Wald. 



Birds Burm. p. 84 ; Hume (^ Dav. 8. F. vi, p. 48 ; Hume, Cat. 



no. 101 bis ; id. 8. F. xi, p. 31 ; Hume 8f Inylis, 8. F. ix, p. 246; 



Oates, B. B. ii, p. 1 ; 8alvadori, Ann. Mus. Civ. Gen. (2) v,. 



p. 573. 

 Micropus pacificus, Hartert, Cat. B. M. xvi, p. 448. 



Coloration. Upper plumage blackish brown ; the feathers in 

 young birds with pale edges, that grow indistinct in older speci- 

 mens ; a broad white band, the feathers black-shafted, across the 

 rump ; chin and throat whitish, the shafts dark ; rest of lower 

 parts brown, each feather with a suhterminal blackish band and a 

 whitish edge at all ages. 



Bill black ; iris deep brown ; feet purpUsh black (Davison). 



Length 7 ; tail 3-2 ; wing 7 ; tarsus 0-45 ; the outer exceed the 

 middle tail-feathers by about 1-25 inch. 



Distribution. Assam, Cachar, and Manipur, throughout the 

 Bm^mese countries and the regions to the eastward, from Japan 

 to Australia. 



Habits, Sfc. But little known ; it is even uncertain whether this 

 species is resident in Burma. It was seeu by Oates, generally 

 in large flocks, flying at a considerable height, during the greater 

 part of the year, but he doubts if it breeds in the country. It is 

 known to breed on rocks and houses in islands off the coast of 

 China. 



1072. Cypselus leuconyx. Bhjili's White-rumped Swift. 



Cypselus leuconyx, Bh/th, J. A. 8. B. xiv, p. 212 ; id. Cat. p. 85 f 

 Jerdon, Mad. Jour. L. 8. xiii, pt. 2, p. 144 (1844) ; Horsf. ^ M. 

 Cat. i, p. 109; Jerdon, B. I. i, p. 179 ; id. Ibis, 1871, p. 354 ; 8dater, 

 P. Z. 8. 1865, p. 600 ; Blyth, Ibis, 1865, p. 45 ; 1866, p. 340 ; 

 1870, p. 161 ; Tytler, Ibis] 1868, p. 195 ; Hume, 8. F. iii, p. 44 

 id. Cat. no. 101 ; Butler, 8. F. ix, p. 379 ; Barnes, Birds Bom 

 p. 86. 



Cypselus pacificus, aintd 8toliczka, J. A. 8. B. xxxvii, pt. 2, p. 18 ; 

 nee Lath. 



Micropus leuconyx, Hartert, Cat. B. M. xvi, p. 450. 



The White-claived 8wift, Jerdon. 



Coloration similar to that of C. pacificus, but dimensions much 

 less, so as fully to justify separation. The feet (not the claws) 

 are pale coloured, almost albescent in some specimens (Hume). 



