﻿INTRODUCTION. 



In the present memoir, the determination and description of the 

 Leafhoppers collected by Prof. Koebele and Dr. Perkins, and 

 partially discussed in the ninth part of Bulletin I, are now com- 

 pleted, — together with those found by Mr. Muir in the Fiji Isles, 

 as well as two interesting" forms from China. 



In the former contribution, 85 genera and 212 species were 

 erected as new, while 58 genera (and subg'enera), and 175 species 

 (and varieties) are now added, a total of 143 genera and 387 

 species, making a considerable increase in our knowledge of Ans- 

 tralo-Fijian Leafhoppers, as almost all of the new forms are from 

 these countries. At the same time, it must bs insisted that these 

 form but a small proportion of the total Leafhopper Fauna of 

 the Countries mentioned. 



The Australasian (*) Region seems to embrace four sub- 

 regions : 



1. The AusTROM^\L.\YAN (or Papuan), including that of the 

 same name of Wallace, but extending to include the tropical 

 forest of Queensland, New Caledonia and adjacent islands as far 

 a'^ the Fijian Archipelago. 



2. The EuRONOTiAN (or Bassian). including the Soutl:eastern 

 third of Australia and Tasmania. 



3. The Maorian, including New Zealand and adjacent isl- 

 ands. 



4. The Westralian, or West Australia. 



Nothing is known of the indigenous Hemiptera of Tahiti, Sa- 

 moa, the Tuamotus, &c., but they are probably a mixture of 

 various faunas. The Hawaiian Archipelago forms an unattach- 

 ed subregion of great antiquity. From the little that is known of 

 them, the Carolines and Marshalls and perhaps the Mariannes, 

 belong to the Austromalayan. 



* I prefer this name of Huxley's to the usual "Australian" of authors. It is very 

 confusing to term the whole Resiion 'Australian.' as one ean then not understand 

 readily whether the mainland, or the region as a whole. Is intended. 



