Fulgoroidea Derbidae 
5 
Dozier, Fowler and others on the fauna of the Americas; and by Mat- 
sumura, Esaki, and Kato on the species of Japan. 
GEOGRAPHICAL DISTRIBUTION 
The species of this family are widely distributed in all parts of the world 
save the extreme Arctic and Antarctic regions. This family reaches its 
greatest development, however, in the tropical regions of the world. There 
are relatively very few species in the temperate regions of the globe. If the 
island of Formosa be not included in the Palearctic Region, the family is 
represented in this, the largest zoogeographic region of the world, by a 
single genus, Melenia Haupt, with two species in the Mediterranean Sub- 
region, and by a few genera and species in Japan. The faunas of North 
America, Central America, the Pacific Islands, Japan and India are fairly 
well known, but vast regions of the world have hardly been explored. The 
geographic distribution of each species is indicated by superscript figures at 
the end of the lines, which correspond to geographic regions designated by 
the same superscript figures. In general we have indicated the distribution 
as given by the author of the reference, using the country as the smallest 
unit except in the larger countries, where states and provinces are used as 
the smallest units. In the larger island groups the individual islands are 
indicated wherever possible in view of the importance of island endemism. 
FORM OF THE PRESENT CATALOGUE 
This catalogue follows the general form of the present series. The family 
is divided into subfamilies and tribes, and the genera are arranged under 
each category in as nearly a phylogenetic order as our present knowledge 
will permit. The species are arranged under the genera in alphabetic se- 
quence. Titles of books are not abbreviated but are condensed if they are 
unduly long. The abbreviations of journal references follow in general the 
scheme proposed in the World List of Scientific Periodicals with minor ex- 
ceptions, the chief difference being that the names of countries, states, cities 
and other geographical units are not abbreviated. A few references are 
listed under their titles rather than under the abbreviations of the journals 
in which they were published, because in these cases the titles are usually 
better known than the journals, for example. Van Duzee 1917 Cat. Hemip. 
North America not Techn. Bull. California Agr. Exp. Sta. Ent. 2. If the 
journal has been published in series the abbreviation of the journal is fol- 
lowed by a series number or by such an abbreviation as n. s. (new series), 
o. s. (old series), n. f. (neue Folge), or the like. This is followed by a note 
indicating the nature of the reference. 
The notes which follow the references are generally self explanatory, but 
