On Nevj Neotropical Birds. 353 



The Hon. Walter Rothschild kindly allowed me to describe 

 this form, of which three specimens are in his museum, 

 while I have seen a fourth with broken bill in Mr. W. F. H. 

 Rosenberg's possession. 



These sjDecimens clearly represent a larger form of A . livida 

 of Chile, the bill being much stronger and thicker than in 

 all Chilian examples I have examined. The wings and the 

 tarsi are a little shorter and the tail is rather longer. The 

 upper and under parts of the body are of a clearer and more 

 greyish shade, and the tip of the under mandible in all these 

 birds is more or less blackish, this being' apparently never 

 the case in Chilian birds. 



10. MyIOTHEEETES STKIAT1COLLIS PALLIDUS Beli., Bull. 



B.O.C., vol. XVI., p. 98 (May 1906). 



M. M. striatïcollis Sci. dictae valde affinis sed abdomine 

 rufescente pallidiore, gulae striis obscurioribus et minus 

 distin ctis, necnon rostro breviore et angustiore distinguendus. 



5 ? al. 311-29, caud. 97-96, culm. 21f-2H, tars. 23A- 

 22i mm. 



Habitat: Tucuman. 



Typus : in Mus. H. v. B. : S ad. ISTorco, Prov. Tucuman, 

 1200 metres, 11th August 1904. [L. Dinelli leg.] 



Having compared the pair of birds from Tucuman with a 

 good series of specimens from Bogota, Ecuador, Peru and 

 Bolivia, I find that the Tucuman birds differ at a glance 

 in having the abdomen of a rather lighter rufous with a 

 more greyish tint ; also in having the dark stripes on the 

 throat and lower neck rather browner and less blackish. 

 They also possess much smaller, shorter and narrower bills. 



11. OCHTHOECA LEUCOPHRYS TUCUMANA Beli., Bull. B.O.C. , 



vol. XVI., p. 98 (July 1906). 



O. 0. leucophrys (Lafr. et D'Orb.) dictae ex La Paz (Bolivia) 

 valde affinis sed coloribus laetioribus : uropygio rufescenti- 

 brunneo lavato nectlorso concolore, dorso etiam rufescentiore, 

 tectricibus alarum superioribus mediis et maximis latius 

 rufo-castaneo terminatis, secundariis late rufescente nee 

 anguste fulvescenti-albo extus marginatis distinguenda. 



6 S al.78-77, caud. 73Ì-72Ì, culm. 12§-12i, tars. 21-20^ mm. 



