Birds of Gambia. 
205 
third clutch. In their first attempt, two of the young were 
killed by a Rufous-necked Weaver, while the third, which I 
believe, would have been fully reared, was killed by the 
cock Grenadier Weaver, which broke its upper mandilile when 
12 days old; for at that time at was beginning to feather. 
Incubation lasted thirteen days, and the eggs were white, 
spotted with dull red at the broader end. The second brood 
was killed by the cock giving the young ones whole meal- 
worms; I 'am Tiow accustoming the parents to live ants' " eggs " 
and house-fly larvce (a very small gentle), which they are 
getting to like much more than they did at first Both they 
and the Sivas are very fond of fruit and bread-and-milk, 
taking a great deal of both, but they do not ti'ouble to catch 
their own flies, of which there are plenty constantly in the 
aviary. 
In conclusion they are delightfully tame and interesting 
birds, and I am hoping that the Mesias will be quite success- 
ful in this, their third attempt. 
Birds of Gambia. 
By E. Hopkinson, D.S.O., M.A., M.B. 
{Continued from page 18G). 
LARIDuE. 
Hydrochelidon leucopiera. WHITE -WINGED BLACK TERN. 
Range. Central and South Euroi>e tc Central Asia and China. 
Australia, New Zealand, Africa, in winter (H.L.) 
Length, 9i inches. 
H. hyhrida. WHISKEEED TERN. 
Eangie. South-west, Central, and South Europe to China, 
Malaya, Australia, Africa. (H.L.) 
Jjength, l.li inches. 
H. nigra. BLACK TERN. 
Range. Europe, Central Asia, Africa in winter. (H.L). 
Length, 10 inches. 
The differential points between the genera Hydrochelidon and 
Sterna are: 
Hydrochelidon. Bill and head the .same length. Tail scarcely 
forked. Wehs of toes deeply indented. 
Sierm. Bill longer than head. Tail deeply forked. Webs 
well developed. 
Sterna minuta. LITTLE TERN. 
Range. Europe; Mediterranean; Central Asia; North India; 
Java; and South Africa in winter. (H.L.) 
