82 PROCEEDINGS OF THE ACADEMY OF 



No. 42,074, Mirador, Mexico, is extremely similar to the last, 

 except that it lacks the ashy tinge on the side of the breast. 

 Wing, 8.85; tail, 7.80; culmen, .65; tarsus, 2.40; middle toe, 

 1.45. Another Mirador specimen (No. 23,809) is exactly similar; 

 it measures : wing, 9.40 ; tail, 8.10 ; tarsus, 2.30 ; middle toe, 1.45 

 nearly the same as the Washington specimen. 



No. 5,841, Puget Sound, October 4, is- exactly similar to No. 

 6,874 (Sacramento Valley), and has, like it, the forehead strongly 

 tinged with dull rusty. Wing, 8.90 ; tail, 8.00 ; culmen, .62 ; tar- 

 sus, 2.45; middle toe, 1.55. 



The adult females differ prett}*- constantly from the males in 

 the much browner upper parts, and rustj^ instead of ashy nape 

 and auriculars though this last feature is a less constant dis- 

 tinction. 



No. 26,588, Washington, D. C. Similar to the male, but the 

 upper parts lacking entirely any bluish cast, and the rufous of the 

 lower parts less vinaceous in tint. Forehead tinged with rusty 

 brown ; neck and auriculars uniform dull rufous, with a rust}* - 

 brown tinge, and sides of the breast entirely destitute of ashy 

 wash. Wing, 10.80; tail, 9.00; culmen, .75; tarsus, 2.65; mid- 

 dle toe, 1.85 ; fourth and fifth quills equal and longest*; third 

 longer than sixth ; second intermediate between sixth and 

 seventh ; first, three inches shorter than the longest. 



No. 57,867, Tehuantepec, S. Mexico (January 8, 1869), is exactly 

 like No. 26,588, except that the tibiae are deeper, and nearly uni- 

 form, rufous. Wing, 10.35; tail, 9.40 ; culmen, .70; tarsus, 2.80 ; 

 middle toe, 1.70. 



No. 55,018, Mazatlan, W. Mexico (February 21), differs in 

 having the rufous bars of the lower parts browner, more sharply 

 defined, and more regularly transverse. Wing, 10.10; tail, 9.30; 

 culmen, .75 ; tarsus, 2.65 ; middle toe, 1.60. 



Two other specimens (No. 5,792, South Carolina, and No. 49,682, 

 Arizona) are very similar in colors to the last ; their measure- 

 ments may be found in the appended table : 



The following detailed descriptions of young birds are of speci- 

 mens typical of the two styles: 



Young male (55,498, Fort Macon, N. C, February ; Dr. Coues, 

 type of var. Gooperi in Hist. N. Am. Birds, III. p. 231): Above 

 grayish-umber, the feathers of forehead, crown, and nape faintly 

 edged laterally with pale rust}'; occiput unvaried blackish, feathers 



