452 APPENDIX (MNIOTILTID^). 



on the abdomen, crissum, and under tail-coverts. Lining of wings 

 very pale pearl-grey. Length 4*50 inches, extent 6'10, wing 

 1-84, tail 1-80, tarsus 0-73, bill (culmen) 0-50, from nostril 0-30. 

 {Breiuster.) 



Adult female. Similar to the male, but with the crown deep 

 plumbeous ; the abdomen and crissum pale chestnut ; the external 

 webs of second pair of rectrices margined with white. (Brewster.) 



Young male. Similar to the female, but with the plumbeous of 

 the crown clearer, the brownish wash beneath confined to the 

 abdomen and crissum, the white of tail restricted to outer pair of 

 rectrices and a narrow tipping on the second pair. {Breivster.) 



" Upon comparing the California bii'd with P. plumbea as repre- 

 sented by my Arizona specimens, the following differences appear : — 

 The ash of the upper parts is decidedly plumbeous instead of bluiSh ; 

 the throat, breast, and sides dull ashy instead of ashy white ; the 

 abdomen, crissum, and under tail-coverts fulvous, in some specimens 

 pale chestnut, the light edging of the tail-feathers confined to the 

 outer pair of rectrices (with sometimes a slight tipping on the second 

 pair) and on these restricted to the extreme tips and a narrow 

 margin along the outer web ; the lining of the wings pearl-ash instead 

 of white, and the secondaries and tertials edged with light brown. 

 There is no pure white anywhere on the bird, and the general 

 aspect beneath is nearly as dark as in the Cat- bird. 



" The proportions also apparently differ. The bUl and tarsi are 

 longer and more slender than those of P. j^lumhea ; but the wings 

 and tail, especially the latter, are generally shorter than in the 

 specimens of plumhea which my collection embraces." {Brewster.) 



Hah. California. 



11. Polioptila bilineata. 



Culicivora bilhieata, i??j. Cons}}. i. p. 316 (1850, ex LicM. MSS.). 



PoUoptila bilineata, Scl. P. Z. S. 1855, p. 12, 1860, pp. 273, 291 ; 

 id. Cat. Amer. B. p. 13 (1862) ; Baird, Review Amer. B. i. p. 72 

 (1864) ; Gray, Hand-l. B. i. p. 237, no. 3444 (1869) ; Scl. 8f Salv. 

 Nomencl. Av. Neotr. p. 4 (1873) ; Salv. ^- Godm. Biol. Centr.-Amer., 

 Aves,}. p. 52 (1879) ; Boucard, P. Z. S. 1883, p. 439. 



Polioptila superciliaris, Later. Ann. Lye. N. Y. vii. pp. 304, 322 

 (1861) ; Baird, Review Amer. B. p. 71 (1864) ; Scl. ^- Salv. P. Z. S. 

 1864, p. 344 ; Laivr. Ann. Lye. N. Y. viii. p. 178 ( 1865) ; Salv. Ibis, 

 1866, p. 190; Lawr. Ann.' Lye. N. Y. ix. p. 92 (1868); Gray, 

 Hand-l. B. i. p. 237, no. 3436"(1869) ; Salv. P. Z. S. 1870, p. 182. 



Polioptila albiloris {non Scl. &• Salv.), Tacz. P. Z. S. 1877, p. 319, 

 1879, p. 223; id. Orn. Perm, p. 452 (1884). 



Adult male. General colour above pure French grey, the long 

 silky feathers of the rump whitish near their ends ; wing-coverts 

 like the back, the median and greater series with concealed dusky 

 bases ; bastard-wing and primary-coverts dusky, edged narrowly 

 with light grey ; quills dusky brown, edged with light French 



