ORIENTAL CHIMjSEY SWALLOAV. 
173 
a matter of fact.* Would it not be advisable to make 
this matter of fact certain before Ave dispute about an 
idea? To do this Ave must knoAv Avhere the white and 
rust-coloured SwalloAvs are known to dAvell distinctly. 
Hoav far, and in Avhat statistic relation, the one form 
extends into the territory of the other, and in Avhat 
relation there is a proportion betAveen the two forms. 
We might then help each other to solve this riddle, 
and then we shall have no difficulty in being certain 
about the name.” 
This paper I think clearly establishes the fact of the 
identity of the v'ariety Avhich is the subject of the 
jiresent notice Avith the Chimney SavrUoav. They breed 
together. Their habits and nidification are similar. 
They only differ in the colour of the abdominal 
plumage, in having a brighter black on the back, and 
perha^is a broader black collar round the neck. 
The specimen sent me by Mr. Tristram, Avhich I 
haA'e figured, and the measurements of which I have 
given in my diagnosis, Avas killed in January, 1860, 
in Egypt, by AV. C. P. Medlycott, Esq. 
The plumage aboA^e is glossy black ; beloAV dark 
chesnut, Avith a broad black collar round the neck. 
Each of the tail feathers has a Avhite spot on its inner 
web, giving the appearance of a crescentic band Avhen 
vieAved from beneath. 
It has also been figured by Audouin, in plate 4, fig. 4, 
of his “Expedition to Egypt.” The draAvings in this 
Avork Avere done by M. Savigny, after Avhom Stephens, 
in his edition of “ShaAv’s Zoology,” named the bird. 
* I append the German text of this passage ; — “Oder endlich gar Localformen 
ein und derselben art ? Aber ist das nicht ein Name ohne alle tiefere 
philosophische Oder physiologische Bedeutung ! Vielleicht um so besser, 
wenn die Philosophic oder Physiologie aiif schwachen Fussen steht. Fine 
thatsachliche Bezeichnung erinncrt doch wenigstcns an einen Thatbestand.” 
