226 



N()KTH AMKlilCA.X lilUDS. 



Beneath white, with <a slight ocliiaceoiis tinge; clieeks, throat, and jugulum with fine 

 narrow strealvS of dusky-brown : breast, sides, and abdomen witli broader longitudinal 

 stripes of clear umber (less slaty than the back), each with a darker sliaft-liue ; on the 

 flanks the stripes are more oval; tibiaj more dingy, markings fainter and somewhat 

 transverse ; anal region and lower tail-eoverts immaculate white. 



yoMH(//ema?c (12,023, Fort Tejon, California; J. Xantus). Similar in general appear- 

 ance to tlie young male. Markings beneath broader, and sliglitly sagittate in form, 

 becoming more transverse on the flanks ; paler and more reddish than in the young 

 male ; tibia; with brownish-rufous prevailing, this in form of broad tiansverse spots. 



Hab. Entire continent of North America, south to Panama; Bahamas (but not West 

 Indies, where replaced by A . fringilloides, Vig.). 



Localities: Oa.xaca (Sci,. 1858, 295); Central America (Scl. Ibis, I, 218); Bahamas 

 (Brvant, I'r. Bost. Soc. VII, 1859); City of Mexico (Scl. 18G4, 178); Texas, San 

 Antonio (Dkessek, Ibis, I8GCi. 32+) ; Western Arizona (CouEs) ; Mosquito Coast (Scl. & 

 Salv. 1867, 280) ; Costa Rica (Lawr. IX, 134). 



LIST OK SPECIMENS EXAMINED. 



National Museum, 51; Philadelphia Academy, 14; New York Museum, 7; Boston 

 Society, 5 ; Museum, Caniliridge, 9 ; Cab. G. N. Lawrence, 1 ; Coll. R. Ridgway, 4 ; 

 Museum W. S. Brewer, 1. Total, 92. 



Measiirenients. 



Specimens from different regions vary l)tit little in .size. The largest are 

 4,198, 9 , San Francisco, Cal., winter, 16,957, 9, Hudson's Bay Territory, and 

 55,016, 9, Mazatlan, Me.xico, in which the wing ranges from 8.40 to 8.50, 

 the tail 7.00. The smallest females are 45,826, Sitka, Alaska, and 11,791, 

 Simiahmoo, W. T., in which the wing measures about 7.80. A female 

 (32,499) from Orizalia, Mexico, one (8,513) from Fort Yuma, Cal., and 

 one (17,210) from San Nicholas, Lower California, have tlie wing 8.00, 

 which is about the average. The largest males are 54,336, Nulato, Alaska, 

 58,137, Kodiak, Alaska, 27,067, Yukon, mouth of Porcupine, and 55,017, 

 Mazatlan, j\Ie.\ico, in which the wing measures 7.00, the tail 5.60. Tlie 

 smallest males are 5,990, Orange, N. J., 8,514, Shoahvater Bay, ^V. T., 

 21,338, Siskiyou Co., Cal., 37,428, Orizaba, Mexico, and 5,584, Bridger's 

 Bass, Utah; in this series the wing measures 6.50-6.7(1, the tail 5.40 - 

 5.60. A sijeeimon from Costa Rica measures : wing 6.70, tail 5.35. Thus 

 the variation in size will be seen to be an individual difference, ratlier than 

 cliaracteristic of any region. Some immature specimens from the north- 

 west coast of North America (as 45,828, <?, Sitka, Pius. Am., 5,845, $, Fort 

 Steilacooin, W. T., 11,791, Simiahmoo, Buget Sound, and 8,514, Shoahvater 

 Bay, W. T.) are mucli darker than others, the bro\\n abo\e inclining to 

 to blackish-sepia ; no other differences, however, are observable. An adult 

 from the Yukon (54,337, 9) has the nilbus bars beneath remarkably faint, 

 altliougb well defined: another (19,384, 9, Fort Besolution), in immature 



