SPECIES OF BIROS, 
315 
tance of his observations. It is not, it is true, a new mode 
of determining* species ; for similar minute distinctions 
have long since been made by sportsmen, who, for 
example, distinguish two kinds of the common snipe, 
naming the smaller the high crowned; and some jagers 
even maintain there are three species. Bird catchers 
speak of two species of the goldfinch, ( Fr . carduelis ,) 
viz. a larger and a smaller ; also, of an Alder Siskin and 
a Birch Siskin ; of two kinds of grosbeak, ( Loxiapyr .); 
of a larger and smaller nightingale; of different finches ; 
of different linnets, ( Fringilla linaria .) These distinc- 
tions, Brehm says, he has proved to be correct, by a 
careful examination of the osteology of the birds in 
question. 
26. SYLVIA VIGORSII. VIGORS’ WARBLER. 
AUDUBON, PLATE XXX. — MALE. 
Nothing whatever is known of the habits and man- 
ners of this species, named after Mr Vigors, an active, 
intelligent, and ingenious ornithologist. 
27. SYLVIA CHILDRENII. CHILDREN’S WARBLER. 
AUDUBON, PLATE XXXV. 
A rare species, named after Mr Children, the 
celebrated chemist. 
28. SYLVIA CARBONATA . — THE CARBONATED WARBLER. 
AUDUBON, PLATE LX. 
A new species, concerning which nothing is known, 
killed by Audubon in the state of Kentucky. 
29. SYLVIA EATHBONII. THE RATHBONE WARBLER. 
AUDUBON, PLATE LXV. 
Of this new and beautiful species, named in remem- 
brance of the Rathbones of Liverpool, nothing is 
known. 
