50() CYPSELID^li. 



closely resemble the Taclwrnis infumata, that most" Indian field- 

 ornithologists admit that they have often shot one for the other. 



n-Ii. S 2 <id. sk. Port Blaiv, S. Andaman, June, Tweeddalo and 



July (JR. J. Wimberley). Hume ColLs. 



i-n. S ; o, p. 2 Button Island, March (A. O. Hume Coll. 



ad. sk. Huvw). (Types of C. inexpedata.) 



q, r. (S ad. sk. Mount Harriet, S. Andaman, Hume Coll. 



March ( W. Davison), 

 s. Ad. sk. Aberdeen, S. Andaman, Nov. Hume Coll. 



(A. de Roepstorff). 

 < M. (5 ; ^- 2 S. Andaman, March ( W. Ham- Tweeddale Coll. 



ad. sk. say), 



w. Ad. sk. Malacca ( Verreau.v). 



,,. y ^ ; ~-(i\ 5 Selanjj-ore, March, April, Nov. Hume Coll. 



ad. sk. ( W. Davison). 



e'. (5 ad. sk. Amherst, Tenasserim, June 20 Hume Coll. 



( W. Davison). 



Subsp. (3. CoUocalia merguiensis. 



Collocalia spodiopygia, Hume, Stray Feath. 1875, p. 318 ; Hume Sr 

 Davison, Stray 'Feath. 1878, p. 51 ; Oates, B. Burmah, ii. p. 8, 

 part. (1883). 



Similar to C. innominata, but smaller. Lower surface rather 

 pale as a rule, and with very perceptible dark shaft -lines. Feathers 

 of the rump with much developed shaft-lines. This form is paler 

 than C. francica and has longer wings. Single specimens are similar 

 to typical C. francica, but larger series sliow well the above- 

 mentioned characters. Wing 4*75 inches. 



Jlab. Southern portion of Tenasserim and islands of the Mergni 

 Archipelago, from Tavoy Island southwards. 

 a, h. 9 ad. sk. Pakchan, Tenasserim, Jan. ( W. Da- Hume Coll. 



Vison ) 



c-o. S fd. sk. Mergui, June, July {W. Daviso?i). Hume OoU. 



p-ii. 2 ad. ; V, Mergui, April to Dec. (W. Daiison). Hume Coll. 



w. Ad. sk. (Types of the subspecies.) 



6. CoUocalia leucopygia. 



CoUocalia leucopygia, Wallace, P. Z. S. 18G3, p. 384 (New Cale- 

 donia) ; Gray, Ann. S,- Mag. Nat. Hist. 1866, xvii. p. 122; id. 

 Hcmd-l. i. p. 65 (1869) ; Lctyard, Ibis, 1878, p.252 (New Caledonia) ; 

 Tristram, Ibis, 1879, p. 181 (New Caledonia) ; Salvad. Afti H. 

 Ac. So. Torino, xv. p.' 347 (1880) ; Layard, Ibis, 1880, p. 223 

 (Loyalty Islands) ; id. Ibis, 1882, p. 503. 



Adult. Above sooty black, wings and tail glossy black ; a broad 

 white band of feathers with dark shaft-lines across the rump ; chin, 

 upper thi-oat, sides of head, and neck dusky brown, feathers in front 

 of the eye with white bases ; lower surface dirty white, browner on 

 the sides of the body, purer white on the abdomen ; aU the feathers 

 with darker shaft-lines ; longer under tail-coverts glossy brown ; 

 under wing-covcrts dark brown ; thighs and scanty feathers of the 



