94 REVIEW OF AMERICAN BIRDS. | [PART I. 
Contrary to the opinions of most Ornithologists, I have placed 
the genus Donacobius among the Thrushes, rather than the Wrens: 
the reasons for this are given on page 58. 
With these preliminary general remarks, I proceed to present a 
brief synopsis of the genera and subgenera of American T’roglody- 
tidx, which, however artificial, may serve to aid in their determina- 
tion. The fuller characters will be found detailed under each genus :— 
A. Nostrils broadly oval, not overhung; anterior half rest- 
ing in the end of the nasal groove; no lateral septum 
visible. Bill not notched. Tarsi as short as midde toe 
and claw. Legs stout . : ~ . Heleodytes. 
B. Nostrils quite broadly oval, salieoak distinet ifn sep- 
tum, this being concealed by the narrow scale which 
margins the nostril above. Bill not notched. Legs 
stout; claws strong, much curved; tarsus longer than 
middle toe and claw. Tail about equal to wings. . Campylorhynehus. 
C. Bill slender, not notched. Nostrils elongated, in lower 
side of nasal groove, overhung by an arched portion of 
nasal membrane, thickened, with rounded edges. Inner 
lateral toe considerably shorter than outer. 
a. Inner lateral toe equal to hind toe. Lateral plates 
along posterior half of tarsi divided into smaller 
ones . - : : : : : : . Salpinctes. 
b. Inner lateral toe considerably shorter than hind 
toe. Plates of posterior half of tarsus continuous, 
or not divided into smaller ones - 5 . Catherpes. 
D. Nostrils broadly oval, divided by a low wall perpendicu- 
lar to the median nasal septum, but not coming to 
the surface; bordered above by scarcely thickened 
membrane, placed in end of nasal groove. Legs very 
stout. Bill short, broad at base, without notch. Cul- 
men much curved. Tail much graduated, about equal 
to the wings - - : - : ; - . Cinnicerthia. 
E. Bill distinctly notched at end (not notched in any other 
Troglodytidz). 
a. Bill distinctly notched, very high, and much com- 
pressed. Nostrils small, truly circular, opening 
in the middle of the nasal membrane. Tail much 
shorter than (about two-thirds) the wings . . Cyphorinus. 
b. Bill distinctly notched, quite high and compressed. 
Nostrils apparently double, the single aperture 
being divided by a bridge. Tail scarcely more 
than half the wings 2 : : - Microcerculus. 
c. Bill faintly notched, scarcely xi gir than broad » 
the base. Nostrils broadly oval, with membrane 
above, but no thickened scale; divided by a 
septum coming to the surface, which, however, 
