92 ZOOLOGY OF THE VOYAGE OF THE BEAGLE. 



space. Of the few birds inhabiting the desert plains of Patagonia, this is the most 

 abundant. At Port Desire I found its nest : egg, about .83 in length ; form some- 

 what more elongated than in that of the last species ; colour, pale green, almost 

 obscured by minute freckles and clouds of pale dull red. 



3. ZONOTRICHIA STRIGICEPS. Gould. 



Z. capite castaneo, lined media obscure diviso, plumis singulis stria media nigrofuscd, 

 humeri jlexura rufa ; corpore supra fuscescente, plumis singulis stria lata media 

 obscure fused ; remigibus, primariis cauddque nigro-fuscis pallidi fusco marginatis ; 

 strigd super ciliari, faciei collique lateribus, guld pectore abdomineque medio cinereis ; 

 hypochondriis tegminibusque caudce inferioribus flavescentibus . 



Long. tot. 5f unc. ; rostri, i ; alee, 2 J ; caudce, 2| ; tarsi, §. 



Head chestnut, divided down the middle by a line of deep grey, each feather with 

 a stripe of blackish brown down the centre ; point of the shoulder rufous ; the 

 remainder of the upper surface light brown, with a broad stripe of dark brown 

 down the centre of each feather ; primaries and tail brown ; secondaries 

 blackish brown, margined all round with pale brown ; stripe over each eye, 

 sides of the face and neck, throat, breast, and centre of the abdomen, grey ; 

 flanks and under tail-coverts buff; upper mandible black; under mandible 

 light horn colour ; feet brown. 



Habitat, Santa Fe. Lat. 31° S. (October.) 



This species appears to replace in this latitude the Z. matutina, which is so 

 abundant on the banks of the Plata and in Chile, as that species does the Z. cani- 

 capilla of Patagonia and Tierra del Fuego. 



Passerina jacarina. Vieill. 



Tanagra jacarina, Linn. 



Passerina jacarina, Vieill. Ency. Meth. p. 933. 



Emberiza jacarina, D'Orb. fy Lafr., Syn. 



Le Sauteur, Azara, No. 138. 



Euphone jacarina, Licht. Cat. p. 30. 



Fringilla splendens, Vieill. Ency. p. 981 1 



I procured a specimen of this bird at Rio de Janeiro. 



