On two yew Parrots and a new Pigeon. 237 
greatly, in the length of their intestines, the stowing away of 
a greater or less amount of gut in a given space, the abdo- 
minal cavity, becomes simply a mechanical problem, and 
therefore that there is less help in forming a sound view of 
the mutual affinities of birds to be derived from the facts in 
this direction described by Dr. Gadow than from many other 
points, more complicated, and therefore less easily altered, 
in the structure of birds. 
XXI.—Descriptions of two new Species of Parrots and a new 
Pigeon from South America. By Grorce N. Lawrence. 
{[Mr. Lawrence has sent examples of these species to us 
for examination ; and we have appended a few notes.—Epp. | 
CHRYSOTIS C@LIGENA, Sp. Nov. 
Front and lores of a dull yellowish orange ; cheeks of rather 
a light sky-blue; feathers of the crown dull light yellow, 
ending with green; the feathers of the occiput and cervix 
are dark green, yellowish at base, and with the terminal edges 
blackish; back, wing-coverts, and upper tail-coverts dark 
green ; tail-feathers dark green, all, except the two middle 
ones, having their ends for about an inch in extent of a dull pale 
yellow, with a wash of light orange-colour on the inner webs ; 
the first primary is black, the others have their outer webs 
green for four fifths of their length, the terminal portions, 
with the inner webs, being black; the outer webs of the 
secondaries are green, with a speculum of bright orange-red, 
and terminating with deep indigo-blue, the inner webs are 
black ; front edge of the wing with a wash of pale yellow ; 
throat light green, with a wash of blue; breast and abdomen 
yellowish green, the feathers edged narrowly with blackish, 
on a side view the colour is bright verditer-green ; upper 
mandible light horn-colour, with a reddish mark in front of 
the nostrils, the lower mandible is of a darker colour ; feet 
blackish brown. 
Length (of skin) about 13 inches, wing 83, tail 5, bill (along 
the curve) 13, middle toe and claw 2}. 
Hab, Guiana; Essequibo river. 
