Observations of the Naturalhistory of the Swallowtribe : With Collateral Statement of Facts Relative to Their Migration, and to Their Brvmal Torpidity : and a Copivs Table of Reference to Avthors : Illustrated by Figures of Five Species

Observations of the Naturalhistory of the Swallowtribe : With Collateral Statement of Facts Relative to Their Migration, and to Their Brvmal Torpidity : and a Copivs Table of Reference to Avthors : Illustrated by Figures of Five Species