1851.] 151 



Dimensions. J Total length of skin from tip of bill to end of tail 4 9-lOths 

 inches, wing 2 4-lOths, tail 2 inches. 



Colors. 5 . Undpr nnandible viewed from below, dark horn color, superior 

 mandible nearly black. Shafts of quills on the inferior surface of the wing dark 

 brown. Entire plumage above light olive green, inclining to yellowish on the 

 rump and upper tail coverts. Greater and lesser wing coverts broadly tipped 

 with white, appearing to form two conspicuous bars on the wing; quills brown 

 externally, narrowly edged with yellowish green, and internally edged with white, 

 conspicuous when viewed from below. Plumage of the entire under parts greenish 

 cream color, (very delicate and peculiar,) inclining to yellowish on the flanks. 

 Nares and ring around the eyes yellowish white. Tarsi and feet dark. "Iris 

 dark hazel, feet blue." 



9 Slightly smaller, very similar in color to the male. 



iTai. Monterey, California, (Mr. W. Hutton.) Georgetown, California, (Mr. 

 J.G.Bell.) 



Obs. This species of Vireo may be recognized without difficulty by the very 

 delicate cream color of the entire under surface of its body, which color I have 

 never seen in any other bird. In other respects it somewhat resembles Vireo 

 Bellii, though it appears to be a stouter and more robust bird ; the only specimen 

 in the collection of the Academy is that of Mr. Bell ; there are two others in the 

 collection of the Smithsonian Institution, to which they were presented with many 

 other birds, by Mr. William Hutton, a zealous and talented young naturalist now 

 resident at San Diego, in California, in honor of whom I hav^e taken the liberty 

 of naming it. 



Mr. Bell's remarks on this species are as follows: "I shot this bird at George- 

 town, October 15th, 1849. My attention was attracted to it by its song, which 

 somewhat resembled that of the warbling Vireo, (F. gilvus,) though the differ- 

 ence could easily be detected. It was in a very high pine tree, and the only 

 specimen that I ever saw or heard. The country was hilly, and covered with 

 a few oaks. This bird was a male." 



II. Ge^iM? ViREosYLviA, Bonaparte. Geog. and Comp. List of the Birds of 

 Europe and N. America, pi. 26, (1838.) 



1. Vireosylvia olivacea, (Linn.) Aud. B. of Am., pi. 150. 

 Muscicapa olivacea. Linn, Syst. Nat. i., p. 327. 

 ilai. Eastern side of North America. Western? 



2. Vireosylvia viresce7is, (Vieill.) Wilson Am. Orn.ii., pi. 12, fig. 3. ? Aud. 

 B. of Am., pi. 434, fig. 4. 



Vireo virescens. Vieillot, Ois. d'Am. Sept. i., p. 84, pi. 53. 



Lanius agilis, Lichtenstein. Verzeichness, p. 49 ? Spix. Av. Bras, ii., p, a.'j. 

 pi. 34, fig. 1 ? 



Vireo Sartratni, Swainsoti. Fau. Bor. Am. li, p. 235. 



Hab. North and South America. 



Obs. This species is very similar to the preceding in color, but is smaller, its 

 wings are shorter and its plumage is of more vivid green. The under parts of 

 the body are tinged with yellow, especially the inferior tail coverts, much more 

 than in V.olivaceus. It appears to be a common bird in South America, and I have 

 seen specimens said to be from Trinidad. The best descriptions extant of this 



