266 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



parts (especially the breast) and lesser wing-coverts more saffron yel- 

 low; bill black, with basal portion of mandible bluish gray (pale gray- 

 ish blue in life?); legs and feet grayish horn color (bluish gray in 

 life?); length (skin), 198.2; wing, 98.5; tail, 93.5; culmen, from base, 

 21.8; depth of bill at base, 9.1; tarsus, 23.9; middle toe, 15.7.' 



Pacific slope of Guatemala (Vera Paz; Aguna; Escuintla; Volcan de 

 Fuego; Volcan de Agua; San Pedro Martir). 



Icterus macuU-alalus Cassin, Proo. Ac. Nat. Sci. Phila., iii., 1847, 332 ("Vera 

 Cruz," i. e.. Vera Paz, Guatemala; coll. Acad. Nat. Sci. Phila.) ; Journ. Ac. 

 Nat. Sci., Phila., 2d ser., i, pt. ii, 1848, 137, pi. 16, fig. 1.— Sclateb, Cat. 

 Am. Bird.M, 1862, 132 (Aguna and Escuintla, Guatemala); Ibis, 1883, 363 

 (monogr.) ; Cat. Birds, Brit. Mua., xi, 1886, 373 (Volcan de Fuego, Volcan 

 de Agua, San Pedro Martir, Escuintla, and Aguna, Guatemala.) — Salvin 

 and ScLATER, Ibis, 1860, 398 (Volcan de Fuego).— ( ???) Duces, La Natu- 

 raleza, i, 1868, 139 (Guanajuato, Mexico).— Salvin and Goodman, Biol., 

 Centr. Am. Aves, i, 1887, 467. 

 [Iclerus'] macuU-alaius Sclatek and Salvin, Nom. Av. Neotr, 1873, 36. 

 IPendulinus'] maculi-rilalus Bonaparte, Consp. Av., i, 1850, 433 ("Mexico"). 

 Pendulums maadi-alatits Cassin, Proc. Ac. Nat. Sci. Phila. ,^ Apr. , 1867, 56 

 (monogr.; Vera Paz). 



ICTERUS NORTHROPI Allen. 

 NORTHKOP'S ORIOLE. 



Adult male. — Head, neck, upper chest, back, and scapulars uniform 

 deep black; whole rump, upper tail-coverts, lesser and middle wing- 

 coverts, and under jDarts, posterior to upper chest, lemon yellow, rather 

 paler on middle wing-coverts, especially the innermost; wings (except 

 middle and lesser coverts) and tail black, rather duller than that of 

 head, neck, etc.; bill black, with basal portion of mandible bluish 

 gray (pale grayish blue in life); legs and feet grajnsh dusky (grayish 

 blue in life?); length (skin), 213.i; wing, 99.1; tail, 89.4; culmen, from 

 base, 23.4; depth of bill at base, 8.6; tarsus, 25.1; middle toe, 18.3.'' 



Adult fetrmle. — Similar to the adult male, but coloration rather 

 duller; the black less intense; interscapulars narrowly margined with 

 olive-grayish; greater wing-coverts narrowly tipped with pale gray- 

 ish, and remiges narrowly edged with the same; yellow of rump tinged 

 with olive, the longer upper tail-coverts light yellowish olive with 

 dusky mesial streaks; length (skin), 199.7; wing, 92.2; tail, 91.4; 

 depth of bill at base, 8.6; tarsus, 25.4; middle toe, 18.* 



Immature male and female {second yearl). — Pileum and hindneck dull 

 yellowish olive, more grayish posteriorly; back and scapulars rather 

 light grayish olive; rump light yellowish olive, the upper tailcoverts 

 darker and more grayish; lesser wing-coverts light yellowish olive; 

 middle coverts grayish dusky basally, broadly tipped with pale yel- 



' One specimen, with sex undetermined. 



^ One specimen. 



"One specimen, with tip of maxilla broken off. 



