Hirundo arcticincta, Sharpe, Ibis, 1891, p. 119, 1892, p. 305.
H. similis H. angolensi, sed pectore medio abdomineque pure albis, et subcaudalibus brunneis late albo- marginatis distinguenda.
Hab. in monte “Elgon" dicto Africae orientalis centralis.
Adult male. Glossy blue above, with a chestnut forehead and rufous throat ; sides of face and a narrow line encircling the throat blue like the back ; rest of under surface brown, with the ecutre of' the breast and abdomen white ; under tail-coverts brown, tipped with white ; tail-feathers with a large white mark on all but the centre ones : feet brown ; iris brown” (F. J. Jackson). Total length 5.8 inches, culmen 0.4, wing 4.75, tail 2.7, tarsus 0.4.
Adult female. Similar to the male, in colour. Total length 5.8 inches, culmen 0.4, wing 1.8, tail 2.1, tarsus 0.4.
Hab. Mount Elgon, East Central Africa.
It is very interesting to find in the present species a close ally of a Swallow which has hitherto only been known from Angola. It, indeed, very closely resembles H. angolensis, but has a whiter abdomen and also white-tipped under tail-coverts. Mr. Jackson tells us that he found the present species breeding in a large cave on the south side of Mount Elgon at an elevation of 6000 feet, He did not notice it elsewhere, but thinks that it, is not likely to be met with above that elevation.
The description is taken from the type specimen in Mr. Jackson’s collection, and this individual has been figured in the Plate.