ZONOTEICHIA. 369 



birds, mostly from Mexico, have been added to Zonotrichia, chiefly by Mr. Sclater and 

 others, these have since been placed elsewhere, so that the genus now contains about ten 

 species, whereof six are of northern and three of southern domicile, the latter being 

 Z. pileata and its two Patagonian allies ; the tenth is the abnormal Z. vulcani of the 

 highlands of Costa Rica, the true position of which is perhaps still to be indicated. Of 

 the northern species two only are known to enter our region, though Z. querula will 

 doubtless be found on the southern, as it is on the northern, side of the Eio Grande 

 Valley. 



Zonotrichia seems to be essentially a Bunting, and, with several allied genera, would 

 be placed in the Emberizinse by those who see their way to employing subfamilies in 

 the great Family Fringillidae. 



The bill of Z. leucophrys is of moderate size, conical, the culmen nearly straight ; the 

 maxilla is slightly tumid below the nostrils, and somewhat compressed towards the tip ; 

 the tomia has a distinct angle ; there is a membrane over the nasal fossa above the 

 nostrils. The tarsus and the middle toe, with its claw, are subequal, and the lateral 

 toes are subequal. The second, third, and fourth quills of the wing are equal and 

 longest, and form the tip of the wing ; the first equals the fifth ; the secondaries reach 

 to within | inch of the longest primaries ; the tail is nearly even, and of nearly the same 

 length as the wings. The plumage generally has streaks on the middle of the back ; 

 the wings have two whitish bars ; the under surface has no streaks ; the tail has the 

 lateral rectrices plain; the head has a median stripe (wanting in some southern 

 species). 



1. Zonotrichia leucophrys. 



Emberiza leucophrys, Forster, Phil. Trans. Ixii. pp. 403, 426 '. 



Zonotrichia leucophrys, Baird, Mex. Bound. Surv. ii., Birds, p. 15^; Scl. P. Z. S. 1864, p. 174' j 



Dugfes, La Nat. i. p. 140* j Baird, Brew., & Ridgw. N. Am. B. i. p. 566^; Coues, Key N. 



Am. B. ed. 2, p. 383'. 



Supra schistacea, uropygio brunnescente immaoulato, dorso medio rufeseente-brunneo striato ; capite summo 

 nigro, vertioe meio late, superciliis (ab oculis) et cUiis ipsia albis, alis et cauda brunneis, illis albo bifas- 

 ciatis, subalaribus et campterio albis ; subtus grisea gula et abdomine medio albidis, crissoisabeUino induto ; 

 rostro et pedibus nifescentibus. Long, tota 6-75, alse 3-1, caudse 3-0,rostri a rictu 0-6, tarsi 0-9. (Descr. 

 exempl. ex nrbe Mexico. Mus. nostr.) 



Eab. NoKTH Ambbioa, Hudson's Bay \ U. S. from the Atlantic to the Eocky Mountains, 



Cape St. Lucas 5 6. — Mexico, Tamaulipas (ComcA 2), Guanajuato (Dw^es *), valley 



of Mexico {White ^). 



The White-crowned Sparrow, under which name this beautiful Finch is known in 

 North America, is one of the most widely distributed species of that continent, being 

 found from Greenland to Cape San Lucas, and from the Atlantic Ocean to the Rocky 

 Mountains. It was first described by Forster more than a hundred years ago \ and 

 received its English name from Pennant. In Mexico it probably appears only as a 



BIOL. CENTE.-AMEE., Aves, Vol. I., June 1886. 47 



