POLIOPTTLA. 453 



grej' like the back, inclining to hoary white on the margins of the 

 primaries and towards the ends of the innermost secondaries ; 

 upper tail-coverts and tail-feathers black, aU but the centre feathers 

 tipped with white, increasing largely towards the outermost one, 

 which is almost entirely white, with a black base to the inner web, 

 this latter character increasing gradually towards the centre of the 

 tail ; crown of head black, extending down the sides of the neck 

 behind the ear- coverts ; the occiput and nape like the back ; a 

 superciliary streak as well as the lores greyish white, impinging 

 on the base of the forehead ; feathers round the eye, sides of face, 

 and ear-coverts greyish white, the hinder edge of the ear-coverts 

 pui-o white, foi-ming a silvery spot, the upper edge of the ear-coverts 

 black like the sides of the crown ; chin, abdomen, thighs, and under 

 tail-coverts silky white ; the lower throat and breast washed with 

 pale bluish grey, extending on to the sides of the breast ; axillaries 

 and under wing-coverts pure white ; quills dusky below, white along 

 the inner webs. Total length 4'2 inches, culmen 0-5, wing 1-85, 

 tail 1-65, tarsus 0'65. 



Adult female. Differs from the male in wanting the black head, 

 this being only slightly darker grey than the back. Total length 

 3-8 inches, culmen 045, wing I'D, tail 1-75, tarsus 0-7. 



Hab. Central America from Guatemala to Costa Eica and Panama ; 

 Colombia ; Ecuador ; Peru. 



a, b- 6 2 ^^' sk. Costa Eica (Carniiol). Sclater Collection. 



c. Imm. sk. Turrialba, Costa Eica (H. Salvin-Godmau CoU. 



Arce). 



d. S iid. sk. Puuta Arenas, Costa Eica, Salvin-Godman Coll. 



March IS (O. S.). 



e,f. S ad. sk. Chisec, Vera Paz, Guate- Salvin-Godman CoU. 



mala (O. S. S,- F. D. G.). 



(J. S ad. sk. Bugaba, Chiriqui {E. Arce). Salvin-Godman Coll. 



h, i. (S ,k- 2 ad. Lion HiU, Panama (Mc Salvin-Godman Coll. 



sk. Leannan). 



I. 2 ad. sk. Chepo, Isthmus of Panama Salvin-Godman Coll. 



(E. Arce). 



m, n. S ad. sk. Panama (McLeannan). Sclater Collection. 



o, p. S 2 ad. sk. Yeragua {Arce). Sclater Collection. 



q, r. c? 5 ad. sk. Babahovo, Ecuador, Julv Sclater Collection. 



(Fra,^er). 



s. (S ad. sk. Esmer ildas, Dec. (Fraser). Sclater Collection. 



t, u. S 2 ad. sk. Puna Inland { Buckle;/). Sclater Collection. 



i-'>w. S 2 ad.sk. Vuna. Mtind (Fillaffomez). Salvin-Godman Coll. 



.r. 2 ad. sk. Guayaquil. G. Barclay, Esq. [P.]. 



?/. 2 ^^- s^- Pacamayo, Peru (Stoltz- Sclater Collection. 



?)tarm). 



12. Polioptila lactea. 



Adult [maW]. General colour dark slaty blue from the nape to 

 the upper tail-coverts, the long silky plumes of the rump tipped 



