Mr. R. B. Sharpe's Catalogue of Accipitres. 449 



This is similar to A, but evidently somewat older. The 

 external rcctrices are slightly mottled with rufous on the 

 outer webs, the luteous tint of the underparts is much paler, 

 and the shaft-marks on those parts are somewhat smaller ; 

 the dark flank-feathers are spotted with rufous, and some are 

 broadly edged with white next the abdomen. 



(C) Collection of Messrs. Salvin and Godman. 



(D) Cambridge Museum (marked ? ) . 



Both these specimens are from Sacramento valley, and 

 much resemble specimen B. 



(E) Norwich Museum. 



Little Colorado river (marked ^ ) . 



This example resembles B, C, and D, except that the 

 shaft-marks on the under surface are shorter, assuming the 

 form of oval longitudinal spots. 



(F) Collection of Messrs. Salvin and Godman. 

 North Park, Colorado (marked $ ) . 



This Falcon is very similar to B, C, and D, but is begin- 

 ning to acquire rufous cross bars on the wing-coverts and 

 upper tail-coverts ; an exceedingly slight trace of cross- 

 barring is perceptible on the central pair of rectrices, all 

 the others are slightly barred on the outer webs, and strongly 

 on the inner. 



(G) Norwich Museum. 

 Real del Monte, Mexico^. 



This specimen resembles E, except that the nuchal and 

 interscaj)ular feathers are strongly marked with transverse 

 alternate bars of rufous and of dark brown f. 



(H) Cambridge Museum. 



Fort Colville, September 21 (marked ,$ ) . 



* This is the most southern specimen that I have examined, unless the 

 locality of " Contra Costa " attached to specimen I, the latitude of 

 which I have been unable to ascertain, be more so; but one of the 

 types of Lichtenstein's Faleo mexicamis appears to have been obtained in 

 the still more southern locality of Tehuantepec {vide Joum. fiir Om. 

 1872, p. 156), the other being from Monterey, according to Professor 

 Schlegel, I. c. 



t A specimen from Mexico much resembling G id preserved in the 

 British Museum. 



