Concerning the Geographic Distribution of the Yellow Fever Mosquito.

Abstract

The proper consideration of this now all-important species must necessarily be divided into two sections; first, the actual present distribution of the species so far as it can be ascertained; second, the exact limitations of the regions in which, if accidentally introduced, it may reasonably be expected to propagate and to become perfectly established. For immediate quarantine purposes the first of these is the most important, but looking to the future, an exact knowledge of the regions which must be included in the second category is obviously scarcely less important.