INTRODUCTION. 21 



In Southern India and Ceylon we find several peculiar genera, 

 «uch as Cranopy<jia (two species), DemlroiJcetes, Obelura, Sondax, 

 and Si/ntonus, all inonotypic. We find here also peculiar species 

 of genera which have their headquarters in the Burmo-Malayan 

 districts, such as EcJiinosoma, Hypurgas, and Cordax. Adia- 

 thetus is mainly Indo-Buraian, but extends to Borneo : Oonolahls 

 is an Australo-Oriental genus with a single Ethiopian species and 

 one peculiar to Ceylon. In Burma we find, as would be expected, 

 marked Malayan affinities, as shown in the occurrence o£ several 

 species of Eparclius, Hypurgus, Platylabia, Pyge, all of which are 

 better developed in the eastern parts of the Oriental liegion, 

 though not confined to it. Palex is a monotypic genus common 

 to Burma and Sumatra. The Chelisochince are well represented 

 in all tropical Old World regions, but most of the genera re- 

 presented in India are better developed in the Malay Archipelago. 

 Psalis is a cosmopolitan genus, with four species probably [confined 

 to India. Anisolahis, BoreUia, Lahidura, Lahin, Spongiplwra, are 

 all cosmopolitan but represented in India by several peculiar species. 

 Pygidicmna predominates in the Oriental Region, and has four 

 purely Indian species, but it is also represented in South America. 

 Echinosoma is essentially an Old World genus ; of the two 

 Indian species, one is peculiar to Ceylon, the other x*anges from 

 Burma to Borneo. Apachyus is also an Old AVorld geuus, with 

 perhaps two species peculiar to India. 



The following analyses of genera and species and their geo- 

 graphical distribution is of course purely provisional. That of 

 the genera is particularly incomplete, as many of the limits 

 are vague, and the classification of some of the large genera, 

 such as Spongiphora and Labia, requires a thorough revision, as a 

 good many heterogeneous forms are included. A glance at the 

 list, however, will show which genera are confined to the Oriental 

 Region, and of these, which are peculiar, i. e., confined to the 

 Indian Fauna ; the geographical relations of the others are shown 

 by the regions ' in which they occur. 



The analysis of species supplements the list of genera, and here 

 it is possible to be more exact ; in this list it is also stated in 

 what collection or what Museum the type is preserved, where 

 known to the author, what material has been examined in the case 

 of types, syntypes ' or paratypes ", what species are represented 

 in the Nationr.l Collection, and what species are peculiar. 



' The usually accepted zoogeographieal regions, namely Palajarctic, Oriental, 

 Australian, Ethiopian, Neotropical, and Nearctic, are represented by obvious 

 iabbreviations. 



^ These terms are explained in the glossary, q. v, p. 210. 



