214 FALCONID^, DIURNAL BIRDS OF PREY. GEN. 158. 



120, pi. 76 ; Sw. and Rich., F. B.-A. ii, 23 ; Nutt., i, 53 ; Aud., i, 84, 

 pi. 20. F. anatum aud F. nigrkepa Cass, in Bd., 7, 8. . . communis. 



Obs. F. rufigularis, a bird of this section of the genus, admitted to our fauna 

 under the name of F. aurantius (Cass, in Bn., 10 ; Elliot, pi. 32), does not appear 

 to have been taken within our limits. 



** Tarsus scarcely feathered above, with the plates in front enlarged, appearing 

 like a double row of alternating scutella (and often with a few true scutella at base) ; 

 1st and 2nd quills cmarginate on inner web. 



_ ^'^ Pigeon Falcon. Pigeon Haivh. Adult $ above asliy-blue, sometimes 

 ^ almost blackish, sometimes much paler ; below pale fulvous, or ochraceous, 

 whitish ou the throat, the breast and sides with large oblong dark brown 

 spots with black shaft lines ; the tibite reddish, streaked with brown ; inner 

 webs of primaries with about 8 transverse wdiite or whitish spots ; tail tipped 

 with white, and with the outer feather whiteuing ; with a broad subtcrminal 

 black zone and 3-4 black bauds alternating with whitish ; cere greenish- 

 yellow, feet yellow. ? with the upper parts ashy-brown ; the tail with 4-5 

 indistinct whitish bands ; about 13; wing 8; tail 5 ; $ smaller. N.Am., 

 generally distributed, connnon. Observe that Accijiiler fuscus is also -called 

 "pigeon hawk." WiLS., ii, 107, pi. 15, f. 3; Sw. and Rich., ii, 35; Nutt., 



i, GO; Aud., i, 88, pi. 21 ; Cass, in Bd., 9 columbarius. 



; . Pichardson's Falcon. Similar ; sexes nearly alike, both lighter and more 

 o earthy-brown than the ? of the last ; head nearly white anteriorly ; streaks 

 on the cheeks fine and sparse, those on the breast broad and sharp, light 

 brown, with black shaft Hues; tail with 6 ashy-white bands; 9 above with 

 pairs of ochraceous spots on the feathers, and secondaries with three ochra- 

 ceous bands ; wing 9 ; tail 6 ; tarsus nearly 1 J ; ^ smaller. Interior N. 

 Am., especially from the Mississippi to the Rocky Mountains. Very near 

 the last ; both are very closely related to F. cesalon of Europe, the fewer 

 bars of the Aviugs and tail being a principal character. Ridgway, Proc. 

 Phila. Acad. 1870, 145. F. msalon Rich, and Sw., Fu. Bor.-Am. ii, 37, 

 pi. 25 ; Nutt., ii, 558 ; Coues, Proc. Phila. Acad. 1866, 42. PvICHARdsonii. 

 1;' ^-' Pusty-croivned Falcon. Sparrow Hawk. Crown ashy-blue, with a chest- 

 nut patch, sometimes small or altogether wanting, sometimes occupying 

 nearly all the crown ; conspicuous black maxillary and auricular patches, 

 Avhich with three others around the nape make seven black places in all, but 

 a part of them often obscure or wanting; back cinnamon brown, in the $ 

 with a few black spots or none, in the 9 with numerous black bars ; wing 

 coverts in the $ ashy-blue, with or without black spots, in the 9 like the 

 back ; quills in both sexes blackish with numerous pale or white bars on 

 imier webs ; tail chestnut, in the ^ with one broad black subterminal bar, 

 white tip, and outer feather mostly white with several black bars ; in the 9 

 the whole tail with numerous imperfect black bars ; below white, variously 

 tinged with buff, or tawny, in the $ with a few small black spots or none, 

 in the 9 with many brown streaks ; throat and vent nearly white and immac- 

 ulate in both sexes ; bill dark horn, cere and feet 3'ellow to bright orange ; 



