306 
DR. R. W. SHUEELDT’s MORPHOLOGICAL 
Ampelis cedrorum ; secondly, a study of the osteology of Trogon 
mexicanus and T. puella ; thirdly, an examination of the struc- 
ture of a number of the Caprimulgi ; fourthly, an investigation 
of the anatomy of the North-Ameriean Hirundimdce ; fifthly, 
similar inquiries into the morphology of certain Cypseli and 
Trochilt, including extensive comparisons with the facts brought 
out in the first sections of the paper ; and, lastly, a section 
devoted to my final Comparisons and Conclusions. 
Tiie Morphology oe Ampelis cedrorum. 
From an external examination of the subject, we find that the 
following characters are presented : — 
1 . The soft feathers on the top of the head unite to form a 
conspicuous crest. 
2. The bill is broad at its base, rather short, and vertically 
compressed ; while both mandibles show a distinct notch at the 
sides near the apices. 
3. The cleft of the gape extends nearly as far back as the 
anterior arc of the eyelids. 
4. The nostrils are subelliptical and scaled. 
5. The wings are ample, pointed by the 3rd primary of the 10 
composing one of them, the 1st primary being rudimentary. 
6. Peculiar wax-like prolongations of the shaft are found in 
certain of the wing-feathers, and in some individuals in the 
tail-feathers. 
7. Tail very slightly rounded, and composed of 12 rectrices. 
8. Lateral plates of tarsus subdivided, with the anterior portion 
of this envelope composed of six distinct scutes. 
9. Feet moderately strong, and characterized by having the 
basal phalanges of middle and outer toes more or less united. 
10. In form, the body is somewhat robust and full-chested. 
To this we may add that the Cedar-bird builds its nest upon 
trees, and lays spotted eggs, and that the young have a different 
coloration of plumage from their parents, which, in this respect, 
are alike. 
On plucking the specimen the following additional characters 
are revealed : — 
11. The pterylosis agrees almost exactly in pattern with the 
pteryloses of the majority of Passerine birds. A. cedrorum has, 
however, a lateral and narrow tract running longitudinally down 
