227 



not only relatively but actually. In its color it differs by the 

 much deeper tint of yellowish rufous on the breast, and by the 

 spots being thicker and much darker, particularly toward the 

 abdomen, so as to give the whole under surface a much darker 

 appearance. The light spots at the base of the inner webs of all 

 but the outer three quills are whiter and more distinct, forming a 

 marked band on the inner surface of the wing, which in T. Swain- 

 sonii is quite indistinct. I think, therefore, that Lafresnaye's 

 name of minimus should be restored to it. 



In Sclater's list of Bogota birds, published in the Proceedings 

 of the London Zoological Society, two species of Vireo are men- 

 tioned, — Vireo olivaceus and V. Bartramii. I am not positive 

 that the specimen in my cabinet is identical with those examined 

 by Sclater, but it is certainly neither the V. olivaceus nor the V. 

 Bartramii. It has been in my possession since 1845^, and I have 

 been constantly expecting to see it described, but as it seems to 

 have been neglected, I shall describe it here. 



Vireo Bogotensis. Length of skin, 5 to 5^ inches ; wing, 3^ ; 

 tail, 2 Jq- ; tarsus, f ; middle toe, -^-^ ; 2d primary longest, 1st 

 shorter than 3d, and intermediate between it and the 4th. Above, 

 greenish olive, the green tint most conspicuous on the tail-coverts ; 

 head plumbeous, with a dirty white line from the nostril over 

 the eye, bordered by a blackish line between it and the cinereous 

 of the crown — most strongly marked above and behind the eye; 

 Avings brown, with the edsre of the outer webs of all but the first 

 quill of the same olive tint as the back, and the inner webs of all • 

 but the first primaries toward the tips bordered with whitish ; 

 central feathers of the tail olive, and the outer edge of all but the 

 outer two of the same color ; below, soiled white, slightly washed 

 •with cinereous and yellowish on the breast ; abdomen nearly pure 

 white ; crissum clear pale yellow ; flanks and hypochondriacs cine- 

 reous olive ; tarsi wdtli six large scales anteriorly, much more dis- 

 tinctly marked than in V. olivaceus. The bill is stouter, and the 

 gonys, instead of being compressed so as to form a distinct ridge 

 toward the tip, is rounded and slightly flattened. 



Prof. W. B. Rogers exhibited specimens of fossiliferous 

 slate and sandstone from the Dennis River in Maine, 

 and gave a sketch of the order of stratification in that 



