550 BELTED KINGSFISHER. 



is of great length, but very narrow, and disposed in 24 folds. Its 

 length is 3 feet 10 inches, its width from 1^ twelfth to 1 twelfth. The 

 cloaca, y^, is globular, 1 inch in diameter. There are no cceca ; the rec- 

 tum in its interior part has a width of only ^ twelfth. 



The trachea is 4 inches 1 twelfth long, 3| twelfths in breadth at 

 the top, rapidly decreasing, so that at the distance of 1 inch to be 

 2| twelfths, and at the lower part 2 twelfths. Its rings are firm, 

 slightly flattened, excepting those at the top, of which about 12 are 

 cartilaginous. There are 72 rings, the lowest entire ring very large, 

 with a middle partition. The lateral muscles are very slender, as are the 

 sterno-tracheal ; and there is a very large inferior laryngeal muscle in- 

 serted into the first bronchial ring, as well as into the last ring of the 

 trachea. The bronchi are rather short and narrow, of about 15 half 

 rings. The inferior laryngeal muscles may be divided into three por- 

 tions, an anterior, a middle, and a posterior ; and thus supply a deside- 

 ratum, no bird having hitherto been examined in which there are four 

 inferior laryngeal muscles, including the sterno-tracheal slip. 



BLUE-GREY FLYCATCHER. 



MUSCICAPA CCERULEA, WiLS. 



PLATE LXXXIV. Vol. I. p. 431. 



This species breeds very abundantly in South Carolina. A few spend 

 the winter there. I found them also at that season in the Floridas. 

 It is also resident in the Texas, where I found it breeding in the latter 

 part of April. Thus those which retire southward from the United States 

 in winter, return to the Southern Districts as early as February, at 

 which period they are found about Charleston. It occurs sparingly in 

 Nova Scotia, and a pair were observed in one of the valleys of Labra- 

 dor. 



