Pt»LIOPTILA, 



t8 



the Biiporciliary Ktripn; hut the locality aflwifjftuKl, of "Mexico," is 

 oppoHi'd to tlie i(l*-a of itH being tho true biliueata. It m much 

 hirjrcr than tho foiniile o{ nuperriliarin, with tlic wliite on side of liend 

 iiiiich ])iin'r, though otherwise giiuilur. The outer tail feather is 

 entirely white, except at the concealed base ; the next has basal 

 liiilf of inner web blaek, this color extending much beyond tlielthiek 

 of outer web ; the third is white for the terminal fourth or fifth. Tho 

 1st quill is more than half the 2d. It is Hpeeifuially distinct, with- 

 out doubt, from iiu])crcilinrit<, and if not biUiwata and nudly from 

 Mexico, probably indicates the existence of a third species with 

 black h(!ad. Com})ared with a supposed female of /'. olhiloria, the 

 bill is weaker, size larger, more white on tho head and tail, etc' 



Total length, 4.50 ; wing, 1.85 ; tail, 2.10 ; exposed portion of 1st primnry, 

 .88, of 2(1, 1.2^, of longest (moasnred from exposed liase of Ist primary), 1.44 ; 

 lengtli of bill from forehead, .55, from nostril, .33 ; along gape, .GO ; tarsus, .70. 



CI 



i' 



A' 





Smith- 



KUIliBD 



N... 

 9,110 



Collec- 

 tor's 

 No. 



:ii,3uo 



Spx 



Age 



v? 



Locality. 



"Mexico.' 



When 

 Collectttd. 



Received from 



Verreaux. 



Collectnd by 



Polioptila diimicola. 



Sylvia dumicola, Vieill. Nouv. Diet. aI, 170. — In. Enoycl. M<5th. II, 

 1823, 433.— Polioptila dumicola, Sclatek, P. Z. S, lh55, 12. — Cu/i- 

 civora dumicola, Bdum. Reise La Plata, II, 1861, 473 (Montevideo 

 and Parana). 



fCulicioora boliviana, Sclater, P. Z. S. 1852, 34, pi. 47 (Bolivia). 



Uab. La Plata States ; Bolivia ? 



I am by no raeais satisfied that the boliviana, of Sclater, is not 

 a diirerent species from dumicola, at least Smithsonian specimens 

 from the two localities are readily distinguishable. The La Plata 

 bird is nearly uniform lead gray below, including the lining of the 

 wing; on the throat and breast not very much lighter than on the 

 hack, becoming paler posteriorly, but nowhere white. In the IJolivian 

 the under parts may be called dull white, with a slight tinge of 

 plumbeous on the throat, and a rather deeper shade of the same 

 across the breast ; the cheeks below the black patch are quite clear 

 white, and not dark plumbeous. The light edgings on the wings 

 are more conspicuous. 



' The tail feathers are almost too much worn for comparison with the dia- 

 gram furnished by Prof. Peters, but they do not appear materially different. 



^^.''- ' - 



