SYLVICOLINA. — ANALOGIES. . 55 
that Sylvicola contains within itself five smaller 
groups, first resolvable into three primary ones. That 
there is strong reason to suspect a similar union of the 
three aberrant genera of this subfamily, namely, Seto- 
phaga, Trichas, and Accentor, is apparent from the 
fact, that Setophaga rubra, although certainly belong- 
ing to this genus, departs so much from its type, that, 
with a strongly bristled rictus, it has the completely 
pointed and compressed bill of Seiurus auricapillus, 
—a bird which should more properly be placed with 
Accentor. Further, we have recently examined a new 
Setophaga, from Mexico, exhibiting the black striped 
head, and the tawny crown of the last-named bird. With 
these close approximations, one, or at most two, species 
would connect the aberrant Sylvicoline into a circle ; and 
we consider this evidence is sufficiently strong to warrant 
the assumption that such is actually the case in nature. 
(63.) The following table of analogies, condensing 
the result of the foregoing investigation, will explain the | 
relations subsisting between the genera of the Sylvico- 
line, the types of Sylvicola, and the tribes of the 
perching-birds : — . 
Subgenera Genera of f Tribes of In- 
of Sylvicola. the Pariana. Analogies. _ Sessores. 
SYLVICOLA. SYLVICOLA. Bill distinctly toothed. DENTIROSTRES. 
Bill entire, or nearly so; 
the nostrils protected by 
VERMIVORA. PaRus stiff incumbent bristles ; Galati 
the greater power in cee 
feet. 
Mwnioritta. AccENToR Bill entire; climbers. SCANSORES. 
Bill very vende hind toe 
ZOSTEROPS. ‘TRICHAS. lengthened. t TENUIROSTRES, 
Bill depressed ; take their 
DuMEcOLA. SETOPHAGA. food on the win g. t FISSIROSTRES. 
(64.) On attentively studying the above table, the 
only point upon which we do not feel fully satisfied, 
regards the situation of T'richas ; or, rather, relates to a 
suspicion that TJ'richas is not the genuine type of that 
genus which is to represent, in this subfamily, the 
Tenuirostres. 'True it is, that there cannot be the least 
doubt that T'richas intervenes between Setophaga and 
E 4 
