Part IV of this monograph was published in volume 12 of this Journal, pp. 89—120, 1942. Since 1941 the author can devote only a small part of his time to these investigations. This fact, and the shortness of paper available for scientific publications, made him decide to alter the way of publication: the extensive lists of references to literature and the records of distribution with every species have now been omitted. As further parts of this publication will follow with rather large intervals of time, from the present part onward complete lists of references will be added to each part, instead of supplements to the bilbliography published in part I.