Vol. xxxviii. | 62 
Type A: ¢ collected at Dubbar, eight miles south of 
Berbera, British Somaliland, at 700 ft., on December 5th, 
1917, by Mr. G. F. Archer, and presented by him to the 
British Museum. | 
This very distinct species was discovered by Mr. G. F. 
Archer, C.M.G., inhabiting cliffs in the neighbourhood of 
Berbera, British Somaliland, and is named after Mrs. G. F. 
Archer. 
Mr. G. F. Arcurer made the following observations on 
C. olivie :— 
The habitat of this species, as I know it, is very localized. 
I have only met with it in the maritime range at Dubbar, 
seven. miles due south of Berbera, and as far south as 
Bihendula, twenty-five miles inland on the main Berbera— 
Sheill road, at altitudes varying from 700 feet at Dubbar to 
2000 feet in the Bihendula Nullah. I have obtained one 
specimen in October and three in December, and it is only 
in the winter months that it is to be found in this locality. 
I am under the belief that it comes here to breed in the rocks 
and caves of the maritime range—a series of limestone scarps 
rising 1000 feet or more out of the Plain. But, on the other 
hand, I have failed to locate the nests of the bird, and am not 
sure, indeed, whether January and February would be hkely 
breeding-months of a Stock Pigeon in Africa. Anindication 
might, perhaps, be found in the case of Columba guinea, 
a species which is not unlike in habits, except that I have 
never known C. olivie separate itself by more than a few 
hundred yards from the rocks and crevices of the escarpment 
where it lives. 
This bird is, by nature, shy and wary, and sometimes 
goes in small flocks of five or six individuals, more generally 
in twos and three. It feeds on grain, coming down to the 
camel lines.; and it is on such occasions only that an easy 
opportunity is provided to secure specimens. It is very 
difficult to approach in the open. 
Where this species migrates to in the summer months— 
April to September—I am unable to say. It certainly 
