"Leptodactylid" froth nest Nov. 6. 5 km. N. Villavieja, 1400 ft., Huila, Colombia, S.A. similar clocks near water. These were all vacant. They averaged the dimensions estimated for this nest. I believe these empty chambers were old, used, "nest" chambers. They were almost glassy-surfaced inside, as if coated with mucous. The froth of the nest was glistening white and fairly tough in consistency (some persisting for at least 36 hrs. in formalin, and persisting even better in Bouin's fluid for this time). The froth is composed of bubbles of '1/10-4 mm. estimated diameter. Manipulated with a knife blade in collecting the contained tadpoles, it acted about like shaving lather (old-fashioned brush-and-mug type!) The tadpoles, very active, seemed to have been dispersed more or less throughout the mass (possibly greater concentration toward center). The tadpoles show an opaque yolk mass (?) in the abdominal region; they died, unfortunately, before color notes could be taken