FALCUNIDJi — TllK FA IX'UXS. 



]57 



the ])ost('ri()r ])nrtions is very deep, and tlie anterioi' licflit places are much 

 tinged with ochriicuous, the siipraloral stripe being tinged throughout witli 

 the same ; across the breast is a series of small tear-siiaped spots of black, 

 forming an imperfect liand ; there are, however, no other diff(>renees. 



Xos. L'0,52i) (9, Chile, Berlin Museum) and 20,521 (<?, Venezuela) diller 

 from the resl only in a deeper tinge of ochraceous anteriorly beneath, the 

 occipital stripes l)eing very 

 red. 



No. 1S,4!»7 (<?, from the 

 llio I'ecos, Te.xas) is in the 

 pluniiige de.-ii'ribed as that of 

 the young male, having the 

 ru.sty tinge on rump, and 

 more numerous IkuuIs on 

 tail; the breast is almost as 

 deejily ochraceous as the 

 tibia', and the broad black 

 patches of tiie sides scarcely 

 meet across the abdomen, 

 being there broken into 

 streaks. 



A female, nearly adult, from Fiuenos Ayres (■ir(,()lt2, Conchitas ; W. H. 

 Ifud.son), lias the featliers of the upper parts faintly edged with white; the 

 rump and upper tail-coverts consjiieufuisly barred with the same. The head 

 above is decidudly more bluish than in northern exam])les, each feather with 

 a shaft-line of black. Tlie tail has only .seven white bars, — these, however, 

 very shar]ily delined, and very pure white ; the longest primary has eleven 

 white bars. The lower plumage is similar to that of the immature male 

 from the Itio Pecos, Texas (Xo. 18,4'J7). This specimen has the second and 

 third quills equal. 



Fnlni /. 



M.ST OF SPKCI.MEXS RX.\.^^^•^:n. 



NatioiKiI ^[usi'uiii. It; IListoii Sori(>ty, 5; Pliihulc'lpliia Academy, 2; New York 

 Miisouiii, 1 ; G. X. Lawroiu'f, 1 ; R. RidLrway, 2. Total, 2.'). 



iVing. I Tail. 



!».2()- 10.70 (l.liO- K.IMI 



11.01)- 11. (!0 



.80 - 8.SI) 



Mcdsurementif. 



Ciilnun. I Tiirsus. \ Miildle Tut. 



.(il>-.(i8 ; 1.7U-1.8.") 1.;!.")- l.oO 



.71 -.80 I 1.80-2.00 l..-).-)-1.7il 



Si>ecinic IS. 



12 

 9 



Haiiits. Only two specimens of this llawk have been taki'ii within the 

 limits of the United States. One was obtained l>y Dr. Ileerniann on the 

 vast jilains of New ]\Ie.xico, near tiie United States boundary-line. It ap- 

 peared to b(! flying over tlie jtrairies in search of small birds and mice, at 



