220 Mr. R. B. Sliarpe on the Peregrine Falcon 



Xenelaphus. 



Anomalocera, Gray, Scientific Opinion, 1869 ; Philippi, Wiegm. Archiv, 

 1870, p. 46. 



XmelapJms, Gray, P. Z. S. 1869, p. 498, fig. (horns & skull) ; Cat. Ru- 

 minant Mamm. p. 89. 



Xenelaphus anovialocera. 



Anomalncera huamel, Gray, Scientific Opinion, 1869, p. 38o. 

 Xenelaphus Imaynel, Gray, P. Z. S. 1869, p. 497, fig. (horns), p. 498, 



fig. (skull, female). 

 Anomalocera leiicotis, PhUippi in Wiegm. Archiv, 1870, p. 46. 

 Xenelaphus leucotis, Gray, Cat. Rumin. Mamm. p. 89. 



Hab. Penivian Andes, Tinta {Mr. Whitely^jun.). 



Male, female, and young (Brit. Mus.). 



The adult male from Tinta is 28 inches high to the withers, 

 and the body from the chest to the tail is 34 inches long. 

 Length of head 10 inches, of the ears 5^ inches, of the tarsus 

 from the false hoof to the hock 9| inches. 



XXVI. — On the Peregrine Falcon of the Magellan Straits. 

 By R. BowDLER Sharpe, F.L.S., F.Z.S., &c.. Senior As- 

 sistant, Zoological Department, British Museum. 



Mr. Gurney has already (Ibis, 1867, p. 465) drawn attention 

 to the differences existing in the Peregrine from the Straits of 

 Magellan and Chili, which he considers to be undescribed. 

 He writes as follows : — " South of Chili, in the southern part 

 of Patagonia and about the straits of Magellan, a really 

 distinct race does occur, closely allied to F. melanogenys of 

 Australia, from which, indeed, it only differs in its slightly 

 larger size. It is Avorthy of remark that the three southern 

 races of Peregrine Falcons, viz. this Magellan race, to which, 

 I believe, no specific name has yet been given, F. melanogenys 

 of Australia, and F. minor of South Africa, all agree between 

 themselves, and differ from the true F. communis in having 

 much naiTOwer spaces than occur in that bird, between the 

 dark transverse abdominal bars which characterize the adult 

 plumage of all these Falcons." 



Mr. G. B. Gray considered the Magellan bird to be the 

 same as Falco nigriceps of Cassin from Western North Ame- 

 rica. Mr. Cassin, in describing the latter species, gives Chili 

 as an additional habitat, suggesting that its range may extend 

 throughout the whole of the western side of America. I am 

 unable to determine by internal evidence whether Mr. Cassin 

 had adults or young of the Chilian birds, on which to found 

 his opinion. He could hardly have united the Magellan 



