BIRDS OF NORTH AND MIDDLE AMERICA. 267 



Adult ?7^rt/t.— Leno-th (skins), 125.73-133.35 (130.30); wino-, 66.80- 

 69.0!:» (6T.82); tail, 63.50-68.33 (65.02); exposed culmeii, 8.89-10.16 

 (9.65); depth of bill at base, 5.59-6.35 (6.10); tarsus, 17.78-19.81 

 (18.80); middle toe, 12.70-13.21 (12.95); Tvhite spot on outermost tail- 

 feather, 7.62-12.19 (8.38).^ 



Adult female.— hengih (skins), 127.00-132.08 (130.30); wing, 65.53- 

 66.80 (66.01:); tail, 64.<>1; exposed eulmen, 9.91-10.16 (10.16); depth 

 of bill at base, 5.59; tarsus, 18.80-19.56 (19.30); middle toe. 12.45- 

 13.16 (12.70); white spot on outermost tail-feather, 5.08-8.13 (6.60)." 



Central portion of Mexican plateau, in States of San Luis Potosi 

 (Ahualulco, Hacienda La Parada), Hidalgo (Tula), Durango (Ciudad 

 Durango), etc. 



(?) Poosplza hlUncata (not of Sclater, 1850) Sclater, Cat. Am. Bird?, 1862, 110 



(Mexico). 

 \_Poospiza'] bilineata Sclater and Salvin, Nom. Av. Xeotr., 1873, 30, part (Mexico). 

 Amphispiza hilineata grisea Nelsox, Proc. Biol. Soc. Wash., xii, Mar. 24, 1898, 61 



(Tula, Hidalgo, Mexico; U. S. Nat.Mus.). 



AMPHISPIZA BELLI BELLI (Cassin). 

 BELLS SPARROW. 



Adults {sexes alike). — Above (including auricular region and sides of 

 neck) deep brownish slate-gray, becoming browner on back, Avhere, as 

 well as on pileum, sometimes narrowly streaked with blackish or dusky; 

 wings and tail dull blackish, with light brown edgings (pale gra3'ish 

 on primaries), the middle and greater coverts indistinctly tipped with 

 pale brownish butty or pale wood brown; supraloral spot (sometimes 

 also a small narrow streak in middle of forehead), orbital ring, malar 

 stripe, and under parts in general white; lores, broad stripe on sides 

 of throat and foreneck, and spot in middle of chest, black or dusky 

 graj'ish; sides and tianks more or less tinged with buti'y and streaked 

 with dusky; edge of wing pale yellow or yellowish white; maxilla 

 blackish, mandilile pale grajnsh blue (in life); iris brown; tarsi deep 

 horn brown, toes usually darker. 



Young. — Pileum and hindneck dull gray, the former broadly streaked 

 with black; back and scapulars graj'ish brown (between broccoli and 

 hair brown), broadl}^ streaked with black; under parts pale yellowish 

 butt', the chest and sides of throat broadh^ streaked with blackish, 

 the breast, sides, and tianks with smaller streaks of the same; a buffy 

 whitish orbital ring; wings and tail much as in adults, but the epgings 

 browner, and greater wing-coverts tipped with dull buffy. 



Adult male.— l^Qwgih (skins), 124.46-144.78 (137.16); wing, 58.93- 

 70.87 (66.80); tail, 58.93-72.90 (66.29); exposed eulmen, 8.13-10.41 



^ Five specimens. ^ Three specimens. 



