BIRDS OF NOKTH AND MIDDLE AMERICA. 269 



[Icterus} wagleri Sclatek and Salvin, Nom. Am. Neotr., 1873, 36. 



J[cterm'] wagleri Ridgway, Man. N. Am. Birds, 1887, 375. 



Icterus waglerii Sumichkast, Mem. Bost. Soc. N. H., i, 1869, 562 (hot region, 



Vera Cruz) . 

 Pendulinus wagleri Cassin, Proc. Ac. Nat. Sci. Phila., 1867, 55 (monogr.; Coa- 



huila; Mazatlan; San Geronimo, Guatemala). 

 [Icterus dominicensis] var. waglero, B.iIed, Bkewek, and Ridgwav, Hist. N. Am. 



Birds, ii, 1874, 182. 

 Icterus wagleri castaneopectus Bebwstek, Auk, v, Jan., 1888, 91 (Oposura, Sonora; 



coll. W. Brewster) . 



ICTERUS PROSTHEMELAS (Strickland). 

 LESSON'S ORIOLE. 



Similar to i. wagleri but much smaller, black of chest extend- 

 ing over breast, and tail-coverts (both upper and lower) mostly 

 yellow.' 



Adults {sexes alike). — Head, neck, chest, upper breast (sometimes 

 whole breast), back, scapulars, wings (except lesser and middle 

 coverts), and tail black; rest of plumage deep lemon yellow, the yel- 

 low of the breast more or less tinged or mixed with chestnut next to 

 edge of black pectoral area; longer tail-coverts usually more ^r less 

 mixed with black, sometimes wholly black; bill black, with basal por- 

 tion of mandible bluish gray (pale grayish blue in life ?) ; legs and feet 

 grayish dusky or dark grayish horn color (bluish gray in life?) 



Immature {second yearf). — Similar to adults, but back and scapulars 

 yellowish olive-green^ (some of the feathers with concealed central 

 areas of black), the lower hindneck more yellowish olive-green, or 

 olive-yellow (whole hindneck and occiput sometimes of this color). 



Young {first plumage). — Forehead (moi'e or less broadly), orbital 

 region, auricular and malar regions (except sometimes posterior portion 

 of the former), chin, throat, and median portion of upper chest dull 

 black; rest of head and neck, together with back, scapulars, rump, 

 and upper tail-coverts, dull olive-yellow or light yellowish olive-green, 

 the back and scapulars more or less clouded or blotched with black; 

 wings and tail dull black, the lesser and middle wing-coverts tipped 

 with dull olive-yellow or light yellowish olive-green; under parts 

 (except throat, etc.) light yellow (dull canary yellow or straw yellow). 



Adult mffl^e.— Length (skins), 180.3-207 (191.3); wing, 78.5-93.5 

 (86.6); tail, 84.6-100.8 (93.2); culmen, from base, 19.1-21.3 (20.6); 

 depth of bill at base, 7.1-8.1 (7.6); tarsus, 22.1-23.6 (22.9); middle 

 toe, 14.7-17.8(16.3).= 



Adult female.— Ij&ngth (skins), 180.3-195.6 (190.8); wing, 80.3-85.1 

 (83.1); tail, 84.1-90.7 (87.6); culmen, from base, 19.6-21.6 (20.6); 



' The longer coverts sometimes black or partly so, especially the upper coverts. 

 ^In this plumage very closely resembling in coloration adults of I. melanocephalus. 

 ^Twenty-one specimens. 



