. Birds from the islands of Romblon, Sibuyan, and Cresta de Gallo, Further notes on birds from Ticao, Cuyo, Culion, Calayan, Lubang, and Luzon . says: The breadth of the rump band or the amount of striationon the rump, seems to me to be equally as variable as the lengthof the wing and the coarseness or fineness of the shaft stripes onthe under surface. Some stress has also been laid by Mr. Hume onthe dusky ear coverts; and at one time I thought myself that thiswould prove a reliable point of difference between the races; butI find that in a large series the darker and coarser the breast stripe
. Birds from the islands of Romblon, Sibuyan, and Cresta de Gallo, Further notes on birds from Ticao, Cuyo, Culion, Calayan, Lubang, and Luzon . says: The breadth of the rump band or the amount of striationon the rump, seems to me to be equally as variable as the lengthof the wing and the coarseness or fineness of the shaft stripes onthe under surface. Some stress has also been laid by Mr. Hume onthe dusky ear coverts; and at one time I thought myself that thiswould prove a reliable point of difference between the races; butI find that in a large series the darker and coarser the breast stripesthe darker the ear coverts, and just as every gradation in length ofwing can be found, so every intermediate form between the nar-rowly striped examples, with finely streaked ear coverts, and thecoarsely streaked specimens, with nearly unifonn blackish earcoverts, can be met with in a series * * *. It also appears tome impossil)le to settle the question of some of these races until alarger series is at our disposal from various parts of China, andespecially from the headquarters of these swallows in winter. ^Cat. Bds., X, pp. 158-159. o. Plate I. MOUND OF MEGAPODIUS
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