148 SMALL ( REEN-CRESTED FLYCATCHER. 
This bird also feeds on berries towards the end of summer, particu- 
larly on huckle-berries, which, during the time they last, seem to form 
the chief sustenance of the young birds. I have observed this species 
here as late as the 10th of September; rarely later. They do not, to 
‘my knowledge; winter in any of the Southern States. 
————— 
SMALL GREEN-CRESTED FLYCATCHER.* — MUSCICAPA 
QUERULA. — Fic. 55. 
Muscicapa subviridis, Bartram, p. 289.— Arct. Zool. p. 386, No. 268. — Peale’s 
useum, No. 6825. ‘ 
TYRANNULA ACADICA. —Swatnson. 
Muscicapa acadica, Bonap. Synop. p. 68. 
Turis bird is but little known. It inhabits the deepest, thick-shaded, 
solitary parts of the woods, sits generally on the lower branches, 
utters, every half minute or so, a sudden, sharp squeak, which is heard 
* This species, with the two following of our author, have been separated from 
the Tyrants, and placed in a sub-genus, Tyrannula. They are, however, in 
reality, little Tyrants, and agree in their habits, as far as their smaller size and 
weaker powers enable them. Their food is nearly the same, more confined, how- 
ever, to insects, sufficient power being wanting to overcome any stronger prey. 
Tyrannula will contain a great many species most closely allied to each other in 
form, size, and color ; so much so, dak itis nearly impossible to distinguish them, 
without a comparison of many together. When they are carefully analyzed, they 
seem distinct, and, the characters Bein constant, are also of sufficient specific im- 
portance. ‘They are natives of both North and South America, and the adjacent 
islands ; the North American known species are, — those described by our author, 
which will be found in another part of this volume, one or two figured by Bona- 
parte, with two new species discovered in the course of the last over-land arctic 
expedition, and described by Mr. Swainson in the second volume of the Northern 
Zoology. South America, however, possesses the great host of species, where we 
may yet expect many novelties. The extent and the closely-allied features of the 
group render them most difficult of distinction.* 
Both this form and the Tyrants are confined to the New World, and the Jatter 
may be said to represent the great mass of our. Flycatchers. 
The new species described by Mr. Swainson are, T'yrannula pusilla, Sw., very 
closely allied to Muscicapa querula of Wilson, but: satisfactorily proved distinct ; 
the wings are much shorter, somewhat rounded, and the comparative proportion of 
the quills differ ; the colors, however, nearly agree: the species brought home by 
the expedition was killed at Carlton House in 53° N. lat., and it extends southward 
to Mexico. — 7. Richardsonii, closely resembling 7’. fusca; it differs in the form 
of the bill, and size of the feet ; the crest is thick and lengthened ; the upper plumage 
is more olive, while the under has an olive whitish lint; the tail is more forked. : 
was found in the neighborhood of Cumberland House, frequenting moist, shaoy 
woods by the banks of rivers and lakes. 
Mr. Audubon also figures a species as new, and dedicates it to Dr. Trail, of 
Liverpool ; but, as I have remarked before, it is impossible to decide from a plate, 
| * It may be here remarked that the Prince of Musignano, in his Synopsis, evidently 
recognizes this form as a sub-genus, though he has not characterized it. — Ep. 
