Paper by Adolpho Lutz and Arthur Neiva published in 1912 in Memórias do Instituto Oswaldo Cruz (v. 4, fasc. 1, p.84-95) in Portuguese and German (two columns). The place and date it was finished (Manguinhos, 9 Oct. 1912) are indicated at the end of the paper, which was the fifth written by the two authors. [E.N.]