THE AUK: 
Ae QvUr Avett Ee OU Ni A ls OE 
ORNITHOLOGY: 
VOI: XLV. [itiENG GE Sor. NO. 3. 
AV SEUDY OF THE PHILADELPHIA’ VIREO (VZRZO 
IAG AC ENON ILI ZC) ve 
BY JONATHAN DWIGHT, JR., M.D. 
Plate I. 
THE Philadelphia Vireo was first described as a new species 
nearly half a century ago by Mr. John Cassin, from a specimen 
taken near Philadelphia, Pa., in September, 1842 (Proc. Acad. 
Natwisci: Phila. V,%heb: 18515 ps E5a,epls ro) fig..2). Ltiwas 
many years later before anything was known of the breeding 
habits of the birds, and an article by Mr. William Brewster (Bull. 
Nutt. Orn. Club, V, 1880, pp. 1-7), who found the species rather 
commonly distributed over the Lake Umbagog region in western 
Maine, remains to-day the only sketch we have of them. I should 
perhaps except the notes of Mr. E. Seton Thompson who, in 1884, 
found a nest and eggs near Fort Pelly, Assiniboia, and briefly 
recorded the circumstance (Seton [= Thompson], Auk, II, 1885, 
pp. 305, 306). Few other observers have’ been favored with more 
than rare glimpses of the birds, which are still considered prizes 
wherever they are captured. And yet many specimens, almost 
wholly migrants, have been recorded of late years, so that the 
geographical distribution of the species is pretty definitely estab- 
lished. It appears to winter in Central America, as far south as 
