354 CHECK-LIST OF NORTH AMERICAN BIRDS. 



16. Rhynchopsitta pachyrhyncha (SWAINS.). 



Thick-billed Parrot. 



Macrocercus pachyrhynchns SWAINS. Phil. Mag. 1827, 439. 

 Rhynchopsitta pachyrhyncha BONAP. Rev. et Mag. Zool. VI. 1854, 149. 



[B6 4 , C-, R 3 9',C-.] 



HAB. Mexico. There is said to be a specimen in " the collec- 

 tion of the Philadelphia Academy of Natural Sciences, labelled Rio 

 Grande, Texas, J. W. Audubon," but there is doubt as to whether the 

 specimen was really taken within the limits of the United States. (Cf. 

 BAIRD, Birds N. Am. 1858, p. 66, foot-note.) Its occurrence in Texas 

 is not improbable. 



FAMILY FRINGILLID-^S. FINCHES, SPARROWS, ETC. 

 17. Acanthis brewsterii (RIDGW.). 



Brewster's Linnet. 



(flavirostris var.) brewsterii RIDGW. Am. Nat. July, 1872, 



433- 

 Acanthis brewsterii RIDGW. Pr. U. S. Nat. Mus. VIII. 1885, 354. 



[B , C 147, R 180, C 211.] 



The type-specimen, taken at Waltham, Mass., remains unique. It 

 cannot be identified with any known species, but may be a hybrid be- 

 tween Acanthis linaria and Spinus pinus. (Cf. BREWST. Bull. Nutt. 

 Orn. Club, VI. 1881, p. 225.) 



18. Spiza townsendii (AUD.). 



TownsenePs Bunting. 



Emberiza toivnsendii AUD. Orn. Biog. II. 1834, 183. 



Spiza townsendi RIDGW. Pr. U. S. Nat. Mus. III. Aug. 24, 1880, 182. 



[B 379, C 192, R 255, C 288.] 



The original specimen, taken May n, 1833, in Chester County, Pa., 

 by Mr. J. K. Townsend, remains unique. Its peculiarities cannot be 

 accounted for by hybridism, nor probably by individual variation. 



