164 
ALAUDINjE. 
MaiC; 6-^f if? t\* Foinale, 6I* 
This species, generally dispersed over the Continent, where 
the other is not met with, has been found in a few instances 
in the south-eastern parts of England. The first specimen was 
obtained, in October 1834, near Colchester, by Mr H. Double- 
day. I have compared numerous specimens of both species, 
and find intermediate shades of colour. As in the case of the 
two Wagtails, M. Temminck considers them merely as races. 
Yellow Wagtail. Blue-headed Wagtail. 
Motacilla flava, Linn. Syst. Nat. i. 331. — Motacilla fiava, 
Temm. Man. d^Ornith. i. 260. — Budytes fiava. Blue-headed 
Quaketail, MacGillivray, Brit. Birds, ii. 208. 
FAMILY XX. ALAUDINiE. ALAUDINE 
BIRDS, OR LARKS. 
Body moderately stout or slender ; neck rather short ; 
head oblong, of ordinary size. Bill short, straight, some- 
what conical, nearly as high as broad at the base, slightly 
compressed ; upper mandible with its dorsal line deflected 
and slightly convex, the ridge narrow, the nasal sinus ! 
long and anteriorly rounded, the edges without notch, the 
tip rather acute ; lower mandible with the angle rather | 
narrow, the dorsal line very slightly convex, the tip ra- j 
ther acute ; the gape-line straight. Mouth rather nar- 1 
row ; tongue of moderate length, narrow, at the base j 
emarginate and papillate, the tip slit, and terminated by 
two small, bristly tufts ; oesophagus of moderate width, j 
nearly uniform ; proventriculus oblong ; stomach a re- ! 
markably powerful gizzard, of a roundish form, somewhat 
compressed, with thick lateral muscles, large tendons, 
and dense rugous epithelium, which is much thicker and 5 
nearly smooth opposite the muscles ; intestine of mode- ! 
rate length, rather wide ; coeca very small, cylindrical ; 
rectum gradually dilated. Nostrils elliptical, basal, ante- j 
riorly marginate. Eyes of moderate size, eyelids feather- 
ed. Aperture of ear, large, roundish. E eet of moderate 
length ; tarsus slender, compressed, with seven or eight dis- 
