452 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



ARREMONOPS CHLORONOTUS (Salvin). 

 GREEN-BACKED SPARROW. 



Adults {sexes alike). — Pileum with two broad lateral stripes of black 

 or brownish black, sometimes indistinctly streaked with brown, sepa- 

 rated by a broad median stripe of slate-gray; rest of upper parts uni- 

 form rather bright olive-green; edge of wing canary yellow; sides of 

 head, including malar region, slate-gray, relieved by a narrow post- 

 ocular stripe of brownish black or blackish brown, and a triangular 

 spot of the same in front of eye; chin and throat dull white; chest 

 and sides smoke-grayish, changing to light olive-green on flanks; 

 abdomen white; under tail-coverts yellowish olive or olive-yellowish, 

 sometimes inclining to buff; under wing-coverts mostly pale yellow; 

 maxilla black or brownish black, mandible light colored; legs and feet 

 brownish. 



Young. — Similar to adult, but pileum dull grayish olive-green, 

 faintly clouded with grayish dusky, and under parts mostly grayish, 

 tinged with olive-yellowish and very slightly intermixed with white 

 along median line. 



Length (skins), 123.19-152.40 (141.48); wing, 60.96-68.83 (66.04); 

 tail, 54.61-62.23 (58.93); exposed culmen, 12.70-14.22 (13.72); depth 

 of bill at base, 7.87-8.64 (8.13); tarsus, 22.35-27.18 (24.38); middle 

 toe, 15.75-18.03 (17.02).^ 



Since the above was written, specimens of this form have been 

 received by the Biological Survey from Chiapas and Tabasco, which 

 measure as follows: 



Adult male.— h&ngth (skins), 143.00-149.86 (146.30); wing, 65.53- 

 68.07 (66.80); tail, 58.93-60.96 (59.94); exposed culmen, 14.22-15.75 

 (14.73); depth of bill at base, 9.14-9.65 (9.40); tarsus, 23.37-24.13 

 (23.88); middle toe, 15.49-16.76 (16.00).^ 



Adult f emale.—L&ngth (skins), 139.19-148.34 (140.46); wing, 63.50- 

 68.58 (66.04); tail, 57.15-58.42 (57.91); exposed culmen, 13.97-14.73 

 (14.48); depth of bill at base, 8.64-8.89 (8.76); tarsus, 22.10-23.88 

 (23.37); middle toe, 14.73-15.49 (15.24).' 



Southeastern Mexico, in States of Chiapas (Yajalon; Palenque), 

 Campeche (Apazote), and Tabasco (Frontera; Monte Cristo), southern 

 Yucatan (Chable), Guatemala, British Honduras, and northern Hon- 

 duras (San Pedro Sula). 



Emhemagra chloronota Salvin, Proc. Zool. Soc. Lond., 1861, 202 (Choctum, 

 Vera Paz, Guatemala; coll. Salvin and Godman); Ibis, 1861, 353 (Chisec, 

 Guatemala).— ScLATER, Cat. Am. Birds, 1862, 117 (Guatemala).— Boucard, 

 Proc. Zool. Soc. Lond., 1883, 444, part (Chable, Yucatan).— Salvin and 

 Godman, Biol. Centr.-Am., Aves, i, 1886, 413 (Chable, Yucatan; Brit. Hon- 

 duras; Chisec and Choctum, Guatemala) . 



\_Embemagra\ chloronota 'Gray, Hand-list, ii, 1870, 91, no. 7337.— Sclater and ■ 

 Salvin, Nom. Av. Neotr., 1873, 33. 



^ Seven adults, of which only one is sexed. '' Four specimens. 



