This is the first English edition of this work, which contains 453 pages. The paper strikes one as rather inferior in quality. The book contains in convenient form an enormous amount of facts and authoritative information concerning the non-bacterial human parasites now of such growing importance not only to physicians living in warm climates, but also to those in temperate and even cold regions. Parasite carriers (mosquitoes, tsetse flies, ticks, etc.) are considered fully. The book is sure of appreciation. In the next edition the author no doubt will revise the section on trypanosoma so as to bring it in better harmony with the results of recent investigations.