has S1, novyi. The Neotropical region, which includes all of Central America and all of South America, has the spirochete of Panama, which we have referred to above. Relapsing fever is not uncommon in Colombia and Venezuela, and it •is quite possible that the relapsing fever spirochete found in these countries is identical with the one found in Panama. We propose the name Spirochaeta neotropicalis for the organism which we have referred to as the spirochete of Panama, because it is found in the

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... Neotropical region and because we believe it to be a distinct species. The term spirochete, to paraphrase the words of Fantham, Stephens and Theobald, is used in this connection without prejudice as to the organism's ultimate correct generic name.