Since 1948 when the first part of The Birds of the Republic of Colombia was published new collections have been made in that country with the result that a certain amount of distributional data have come to hand and a ...

Figures given in parentheses are wing measurements from Swann's Monogr. Bds. Prey. Those which do not appear in parentheses are from other published sources, or in most cases they are extreme measurements taken from Colombian ...

In the autumn of the year 1938 the Academy of Natural Sciences of Philadelphia received in the post a section of bamboo inside of which was the skin of a flycatcher. It had been sent by Mr. Kjell von Sneidern, of Popayán, ...