FALGONIDM — FALCONING : FALCONS. 637 



ited little falcon, generally distributed in N. Am., common, representing the merlin of 

 Europe, F. cesalon. Nests chiefly northerly, on branches or in holes in trees, or on rocks ; 

 eggs ranging in size and shape from 1.50 to 1.80 X 1.30, some being subspherical, others elon- 

 gate-oval. The coloration ranges from a nearly uniform deep rich brown (chestnut or burnt 

 sienna), to whitish or white, only marked with a few indistinct dots of dull grayish or drab. 

 Such extremes are connected by every degree; a yellowish -brown gi-ound-color, irregularly 

 splashed with rich ruddy brown, is the usual style. The markings may be very evenly dis- 

 tributed, or mostly gathered in a wreath around one or the other end, or even both ends. The 

 quarry is chiefly birds, even up to the size of a ptarmigan. 



506. F. c. suckleyi? (To Dr. Geo. Suckley.) A dark form, described from the N. W. coast. 

 Dubious. 



507. P. c. rich'ardsoni. (To Sir J. Richardson.) Kichakdson's Pigeon Hawk. American 

 Merlin. " Adult $ ; Upper plumage, duU earth-brown, each feather grayish-umber cen- 

 trally, and with a conspicuous black shaft-line. Head above, approaching ashy-white ante- 

 riorly, the black shaft-streaks being very conspicuous. Secondaries, primary-coverts, and 

 primaries, margined terminally with dall white; the primary- coverts with two transverse 

 series of pale ochraceous spots ; primaries, with spots of the same, corresponding with those 

 of the inner webs. Upper tail coverts, tipped and spotted beneath the surface with white. 

 Tail, clear drab, much lighter than the primaries, but growing darker terminally, having 

 basally a slightly ashy cast, crossed with six sharply defined perfectly continuous bands (the 

 last terminal) of ashy- white. Head ftoutally, laterally, and beneath — a collar round the nape 

 (interrupting the brown above) — ■ and entire lower parts, white, somewhat ochraceous, this 

 most perceptible on the tibias ; cheeks and ear-coverts with sparse, fine, hair-like streaks of 

 black ; nuchal collar, jugulum, breast, abdomen, sides, and flanks, with a median linear stripe 

 of clear ochre-brown on each feather ; these stripes broadest on the flanks ; each stripe with a 

 conspicuous black shaft-streak ; tibiae and lower tail-coverts with fine shaft-streaks of brown, 

 like the broader stripes of the other portions. Chin and throat, only, immaculate. Lining 

 of the wings spotted with oohraceous-white and brown, in about equal amount, the fonrier in 

 spots approaching the shaft. Inner webs of primaries with transverse broad bars of pale och- 

 raceous — eiglit on the longest.' Wing 7-70; tail .5.00; culmen 0.50; tarsus 1.30; middle 

 toe 1.35; outer 0.85; inner 0.70; posterior 0.50. Adult ? : DiflFering in coloration from 

 the male only in the points of detail. Ground-color of the upper parts clear grayish-drab, the 

 feathers with conspicuously black shafts ; all the feathers with pairs of rather indistinct rounded 

 ochraceous spots, these most conspicuous on the wings and scapulars. Secondaries crossed 

 with three bands of deeper, more reddish-ochraceous. Bands of the tail, pure white. In 

 other respects exactly like the male. Wing 9.00 ; tail 6.10; culmen 0.55 ; tarsus 1.40; mid- 

 dle toe 1.50; Young $ : Difiering from the adult only in degree. Upper surface with the 

 rusty borders of the feathers more washed over the general surface ; the rusty ochraceous 

 forming the ground-color of the head, — paler anteriorly, where the black shaft- streaks are 

 very conspicuous ; spots on the primary coverts and primaries deep reddish ochraceous ; tail- 

 bands broader than in the adult and more reddish ; the terminal one twice as broad as the rest 

 (0.40 of an inch), and almost cream color. Beneath, pale ochraceous, this deepest on the 

 breast and sides ; markings as in the adult, but anal region and lower tail-coverts immacu- 

 late; the shaft-streaks on the tibise, also, scarcely discernible. Wing 7.00; tail 4.60." 

 (Ridgway.) Interior N. Am., especially from the Mississippi to the Rocky Mts. ; very near the 

 last, both being closely related to F. asalon, the fewer bars on the wings and tail apparently 

 the principal character. A ? I took in Dakota measures : length 12.75; extent 36.75; wing 

 8.50. 



508. F. sparve'rius. (Lat. spa/rverius, a sparrower. Pig. 378.) Rusty-crowneu Falcon. Spar- 

 row Hawk. Smallest of our FalconiruB ; sexes unlike in color, but of nearly the same sizcj 



