154 RICHMOND, New Birds from East Africa. ena 
singular an appearance, and they are undoubted proof of new 
growth. 
In the Corumba bird they form about the terminal fifth of the 
feather. Thus a breast feather measures, from tip to insertion, .75 
of an inch, of which the buff tip occupies.15 of aninch. A feather 
from the same region in a June Bobolink, from which the tip has 
fallen, and which is further worn, measures only .50 of an inch. 
There can be no reason to question therefore that feathers having 
these tips are recently grown. I emphasize the point, for I have 
yet to see an April Bobolink, and I have examined numerous 
specimens, in which these tips were not prominent. It is, there- 
fore, not alone upon the Corumba specimen but upon these April 
birds that I base my theory of a spring moult in Dolichonyx. 
How or when a caged Bobolink may change plumage no man can 
predict but among wild birds there is as yet no recorded evidence 
that the breeding plumage is not acquired by a complete moult. 
DESCRIPTIONS OF TEN NEW SPECIES’ OF “BIRDS 
DISCOVERED BY, DRA) We wie. ABB OAs UNG Saran 
KILIMANJARO REGION OF EAST AFRICA! 
BY CHARLES W. RICHMOND. 
A very valuable collection of birds made several years ago 
in the Kilimanjaro region of East Africa and presented to the 
United States National Museum by Dr. W. L. Abbott, not only 
supplied to the Museum many species previously unrepresented 
in its collections, but contained numerous species new to science. 
Various causes, mainly lack of material for comparison, have 
prevented the correct determination of a large part of the col- 
lection, although recently, through the generosity of Mr. A. 
‘By permission of Mr. F. W. True, Executive Curator, U. S. National 
Museum. 
