SMALL GREEN CRESTED FLYCATCHER. 
227 
have observed this species here as late as the 10th of Septem- 
ber ; rarely later. They do not, to my knowledge, winter in 
any of the southern states. 
SMALL GREEN CRESTED FLYCATCHER.* — MUSCICAPA 
QUERULA. — Plate XIII. Fig. 3. 
Muscicapa subviridis, JBartram , p. 289. — Arct. Zool. p. 386, No. 268. — Peak's 
Museum, No. 6825. 
TYRANNULA ACADICA.— Swainson. 
Muscicapa acadica, Bonap. Synop. p. 68. 
This 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 
* 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, 
however, 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 colour ; so much so, that it is nearly impossible to 
distinguish them, without a comparison of many together ; when they are 
carefully analyzed, they seem distinct, and the characters being constant, are 
also of sufficient specific importance. 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 Vol. III., one or 
two figured by Bonaparte, with two new species discovered in the course of 
the last overland 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 
latter may be said to represent the great mass of our Flycatchers. 
The new species described by Mr Swainson are, Tyrannula'pusilla, Sw., very 
closely allied to Muscicapa querula of Wilson, but satisfactorily proved distinct ; 
* 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. — En. 
