6 Mr. P. L. Sclater on the Genus Spermophila. 



5. Spermophila nigro-rufa. (Plate I. figs. 1, 2.) 

 Pyrrhula nigro-rufa, Lafr. et D^Orb. Syn. Av. p. 87. 

 Sporophila nigro-rufa, Cab. Mus. Heiii. p. 150. 

 Spermophila nigro-rufa, Gray, Gen. p. 386; Bp. Consp. i. 



p. 495; Pelz. Orn. Bras. p. 226. 



Cinuamomeo-rufa ; pileo, interscapulio, alls et caucla nigris, his 

 fusco marginatis : speculo alari albo : rostro pallide corneo : 

 long, tota 3*5, alse 2'0, caudse 1"5. Fern. Cineraceo-fusca, 

 alis caudaque nigricantibus fusco limbatis : subtus pallide 

 ochracea. 



Uah. Bolivia, Chiquitos {D'Orb.); Brasil. merid., Matto- 

 grosso {Natt.). 



This bird is most like S. nigro-aurantia, but is at once recog- 

 nizable by its black upper back. D'Orbiguy obtained it in the 

 Bolivian province of Chiquitos, and Natterer in the campos of 

 Mattogrosso. My specimens are from Natterer's duplicates. 

 I have compared them with D'Orbigny's types. 



6. Spermophila torqueola. 



Spermophila torqueola, Bp. Consp. p. 495 ; Sclater, P. Z. S. 

 1858, p. 303; et Cat. A. B. p. 105. 



Sporophila ochropyga, Cab. Journ. f. Orn. 1861, p. 5. 



" Spermophila atriceps, Baird," Lawr. Ann. L. N. Y. viii. 

 p. 479. 



Nigra : plaga utrinque cervicali et speculo alari albis : dorso 

 postico et corpore toto subtus pallide rufis; fascia sub- 

 gutturali nigra : rostro corneo, pedibus fuscis : long, tota 

 3*5, alse 2*2, caudse 2"0. Fern. Fuscescenti-olivacea, alis 

 caudaque obscurioribus : subtus valde dilutior, ochraceo 

 perfusa. 



Hab. Western Mexico, Oaxaca {Boucard), Mazatlan [Xan- 

 ^Ms),Tepic [Grayson). 



This Spermophila was first shortly characterized by Bona- 

 parte, in his ' Conspectus,^ from a specimen stated to be in the 

 Berlin Museum. This I have never seen; but I have compared 

 my skins with a marked example in the French National Col- 

 lection. From the Smithsonian and Mr. Lawrence I have 

 received for examination the types of S. atriceps collected at 

 Mazatlan and Tepic by Mr. Xantus and Col. Grayson. These 



