July, 1S43. 1 285 



longest, third nearly equal, and rather longer than fourth, fifth one line 

 shorter than fourth, first intermediate between fifth and sixth. Tail emar- 

 ginate and slightly rounded. 



Colour, Bill dark blackish brown above, pale horn color beneath. Feet 

 black. Plumage of the upper parts dark grayish olive, crown somewhat 

 darker, rump lighter and inclining to grayish. A narrow ring round the 

 eye grayish white. Fore part of breast, sides, and sides of the neck light 

 ash grey, middle of throat white, rest of the lower parts very pale yellow 

 or yellowish white. Primaries and tail feathers wood brown, the former 

 narrowly, and the latter broadly edged with olive. Lower row of lesser 

 wing coverts and the secondary coverts darker, tipped with dirty white, 

 that colour forming two bands across the wings. Secondaries also dark, 

 like the greater wing coverts, and broadly edged with yellowish white. 



Length 5 inches, 2 lines. Extent 8 inches, 3 lines. Folded wing 2| 

 inches. 



No perceptible difference as to colour or size between the sexes. 



Observations. This species will be recognized by its size, its slender 

 form making it the smallest of our North American Tyrannulaa. In colour 

 it most resembles T. Traillii, of Aud., but it is a much smaller bird, being 

 nearly three-fourths of an inch shorter. T. Traillii has the breast and 

 sides of the neck olivaceous ; in this species light ash gray; the tail also of 

 T. Traillii is even. 



It differs from T. pusilla (comparing with the description of Swainson 

 and Richardson as before) in having the wings more pointed, the second 

 and third primaries being longest, and the firstlonger than the sixth; while in 

 pusilla the third and fourth are longest, and the first shorter than the sixth. 

 The upper tail coverts of pusilla are uniform in colour with the back ; in 

 our species lighter : pusilla has the front " hoary;" in this species dark. 

 The lower parts of pusilla are pale sulphur yellow, "approaching to siskin- 

 green ;" in our species yellowish white : the under mandible of pusilla is 

 yellowish brown; of this species horn colour. From the figure in the 

 Fauna Boreali-Americana, pusilla appears to be a stouter bird, much 

 deeper in colour beneath and having a broader bill. Its smaller size, and 

 darker colour above, will distinguish it from T. acadica (being two-thirds 

 of an inch shorter.) which species has also longer and more pointed wings, 

 a much larger bill which is light brown beneath, and an even tail. 



This species was first observed and procured in May, 1839, near Car- 

 lisle, Pennsylvania. Since then numbers have been observed and shot on 

 every succeeding spring. Like the preceding, (T. flaviventris,) this bird 

 does not frequent deep forests, but is found among the scattering trees 

 which border our streams. It is rather shyer than T. flaviventris, and 

 and does not, like that species, seek dense thickets. It also, most proba- 

 bly, goes further north to breed, as after the last of May it is no longer to 

 be seen. It visits us from the south in the latter part of April, generally 

 making its appearance about a week before T. flaviventris. 



