554 Mr. J. H. Gurney's Notes on 



feather of a darker 'hue of the same, but with a few of the 

 feathers at the back of the head sometimes exhibiting a very 

 slight admixture of rufous, this occipital tinge of rufous being 

 present in some individuals and entirely absent in others 

 from the same locality and of the same sex; the average 

 depth of the black subterminal bar on the tail of the adult 

 males is also less than in the northern T. sparverius, as may 

 be seen by a comparison of the accompanying table of mea- 

 surements. These are the only differences between the two 

 races which appear to me to be of a constant character"^; but 

 they are, perhaps, sufficient to warrant the separation of T. 

 cinnamominus as a subspecies of T. sparverius. 



Mr. Ridgway has proposed further to divide T. cinnamo- 

 minus into two races, which he designates as " variety cinna- 

 mominus " and " variety australis ;" but I agree with Mr. 

 Sharpe in thinking that there is hardly sufficient ground for 

 this subdivision f. 



I have examined specimens of T. cinnamominus from the 

 following South- American localities — viz. Peru, Chile, Brazil, 

 Argentine Confederation, Falkland Islands, and Straits of 

 Magellan; these are contained in the British, Cambridge, 

 and Norwich Museums and in the collection of Messrs. Saivin 

 and Godman. The last-mentioned collection also contains, 

 amongst a large series of specimens of T. sparverius from 

 Central America, four which agree in the colour of the 

 crown of the head (slaty, with a very slight occipital tinge of 

 rufous), but not, as regards the males, in the depth of the 

 subterminal bar on the tail, with South-American examples 

 of T. cinnamominus : these four specimens consist of three 

 males, obtained near San Diego (Guatemala), at Chontales 

 (Nicaragua), and on the southern slope of the volcano of Chi- 



* The colour of the iris in T. cinnamommus resembles that of T. sjmr- 

 verius (conf P. Z. S. 1878, p. 435, also Ibis, 1880, p. 362). 



t A. d'Orbigny, in his ' Voyage dans rAmerique meridionale,' 

 "Oiseaiix," p. 122, records a Kestrel obtained by him in the province of 

 Chiquitos, in Bolivia, which much resembled the male of the Cuban T. 

 sparverioides, but which was probably an abnormal individual of T. cinna- 

 mominus, as he states that it was shot " au milieu de beaucoup d'autres 

 individua revetus des couleurs normales." 



