FALCO CjERULESCENS. 
The Falco caerulescens, as it occurs in Java, has presented to me the following 
observations. It has a very robust fabric. The bill has a double notch, which is deeper 
than in any other species belonging to the " Fahones proprie sic dicti" of Bechstein that 
I have examined.. The entire length is six inches and an half. Upper parts blueish 
black, and glossy. Throat, breast, axilkfe, sides of the neck, forehead, and a line 
continued from the environs of the bill over the eye and along the neck, white, with 
a ferruginous tint. Lower part of the breast, abdomen, vent, and thighs, ferru- 
ginous. Hypochondria, thighs posteriorly, and a broad patch extending from the 
eye along the side of the head, black; the plumes which cover the thighs behind, 
are terminated by long silky filaments, or radii, which are straggling and pendulous, 
and by their laxity and irregularity afford a peculiar character to our bird. This is 
not noticed by Edwards in the description of the specimen winch he delineated. 
From the General Zoology it appears that in one specimen, wliich was considered a 
male bird, the under parts agreed with the bird as found in Java, excepting the 
colour and distribution of the plumes just mentioned. In the bird figured by 
Edwards, the under parts were bright orange-yellow, and it exceeded our bird 
nearly one inch in length. 
I became acquainted with the Falco casrulescens in the year 1806, in the eastern 
districts of Java: here I obtained a single individual. I had no opportunity of 
observing its manners personally, but the natives described it as uncommonly bold 
in the pursuit of small birds. During the latter period of my abode at Surakarta, 
several individuals were brought to me from the range of southern hills, which are 
covered with forests. In other parts of the Island I have not observed it. 
