492 SHUFELDT. [VoL. III. 
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and straight, with its sternal end only moderately expanded, as 
is the other extremity of the bone, only moderately tuberous. 
When articulated zz sztu, these bones show no marked departures 
from the corresponding arrangement in all ordinary oscines. 
The Bush-Tits (Psaliriparus) have the bones of the shoulder 
girdle in all respects very similar to those just described for 
Chamea, not omitting the unusual length of the coracoids, which 
here lack but little of being fully as long as the entire sternum. 
In Lophophancs the hypocleidium of the os furcula is inclined 
to be slightly more prominent ; but beyond this minor difference, 
little change is to be discovered in the elements of this pectoral 
arch, beyond what has been given above. 
Troglodytes among the Wrens may have the furcular hypoclei- 
dium still more conspicuous, and this also applies to the genus 
Salpinctes. Os furcula among these latter birds still retains its 
frail structure, a broad U in form, gently curved backwards for 
its inferior moiety, which curvature begins almost imperceptibly 
near its middle. 
When we get among the skeletons of the Warblers (A/xzo¢z/- 
tide), little change is to be found in the shoulder girdle; but 
with them the hypocleidium of the fourchette is always of good 
size, as it is in Accentor modularis. 
Chamea fasciata has a sternum of the well-known passerine 
pattern. It is peculiar, however, in that it is strikingly flat, 
there being but little concavity apparent upon its thoracic 
aspect. Its outer xiphoidal processes are wonderfully slender, 
and the midportion very broad behind, which latter fact renders 
the outline of the body quite square. Its keel is shallow and 
weak. Indeed, the entire bone in this bird is a very delicate 
one, as compared with the size of its owner. Psaltriparus plum- 
bcus has a sternum the very counterpart of the bone in Chamaa, 
only in miniature. Its body, however, is more concaved, and the 
mid-xiphoidal margin not so long comparatively. Its pattern is 
considerably changed in the Crested Tits (Lophophanes), where 
the body is far more oblong rather than square; the mid- 
xiphoidal margin much more contracted; the ‘notching,’ com- 
paratively speaking, not so profound as in the Bush-Tits; the 
keel more ample; and the costal processes and manubrium 
strongly developed. The latter shows a deep carination be- 
neath, which is scarcely at all evident in Chamea. Troglodytine, 
