I 
130 FRINGILLIN^. CORYDALINA. 
the notches almost obsolete, the tip narrow ; lower mandi- 
ble with the angle short and very broad, the dorsal line 
ascending and slightly convex, the back broad, the sides 
rounded, the edges inflected, the tip pointed. Nostrils ba- 
sal, roundish. Head large, ovate ; neck short ; body full. 
Feet of moderate length, stout ; tarsus of ordinary length, 
compressed, with seven scutella ; toes rather large, the first 
stouter, the lateral equal, the third very long. Claws rather 
long, arched, much compressed, laterally grooved, tapering 
to a very acute point. Plumage soft and blended. Bristles 
at the base of upper mandible feeble. Wings of moderate 
length, the outer three quills nearly equal, the second longest, 
the fourth slightly shorter than the third ; outer secondaries 
broadly rounded and emarginate ; inner tapering to a round- 
ed point, one of them, when the wing is closed, little shorter 
than the outer primaries. Tail of moderate length, a little 
rounded. Name from Ko^vdaXog^ a lark. 
202. 1. Corydalina bicolor. Towns. Prairie Lark-Finch. 
Plate CCCXC. Fig. 2. Male. Fig. 3. Female. 
Male black, slightly tinged with grey ; a large patch of white on 
the wing, including some of the smaller coverts, the tips of the first 
row, and their secondary coverts ; primaries and outer secondaries 
narrowly, inner secondaries broadly margined with white ; tail-feathers 
narrowly edged with white, and having a narrow speck of the same at 
the end of the inner web. Female smaller, with the upper parts grey- 
ish-brown, streaked with dusky brown ; the lower white, with oblong 
spots of brownish-black, the abdomen nearly pure white, their sides 
tinged with reddish-brown ; quills dark brown, edged and tipped with 
reddish- white ; the patch on the wing of the same tint ; tail-feathers 
dark brown, the outer externally edged, and all tipped with white on 
the inner web. 
Male, 7, wing 3^%. 
Plains of the Platte River. Plentiful. Migratory. 
Fringilla bicolor, Prairie Finch, Towns. Journ. Acad. Nat. Sc. Philadelphia, v. vii. 
p. 189. 
Prairie Finch, Fringilla bicolor, Atjd. Orn. Biog. v. v. p. 19. 
