INTRODUCTION ccxxi 



Review of Myriopoda. 



Of the few Chilopoda other than those which are probably or certainly importations 

 by man, it is quite possible that Lithobms and Lamyctes, of each of which one species 

 has been described as peculiar, may contain other allied endemic forms. A second 

 Lamyctes forms a new variety of a North American species. In the Diplopoda a 

 species of Polyxcniis (Polyxenidae) and two of Aporodesminus (Cryptodesmidae), the 

 latter genus described as new, are of quite uncertain status. They have been found 

 amongst decaying leaves, etc., and are very probably importations. The most interesting 

 feature of the Myriopod fauna, as at present known, is the great development of species 

 of the genus Dimerogonus, elsewhere known from New Zealand, Australia and Chili. 

 Twelve species have been distinguished by Dr Silvestri in the systematic portion of 

 this work, and no doubt numerous others were not collected by me. They are 

 apparently most numerous on the intermediate islands of the group, as only one species 

 was collected by me on Kauai and none on Hawaii, though I believe I have since 

 found specimens on the latter island. 



Several new additions have been made to the Hawaiian fauna through intro- 

 ductions by man of late years, and we have observed these creatures in boxes of 

 imported plants, when making inspection of these. 



Review of Arachnida. 



Excluding several undetermined species of quite recent introduction, the Spiders, 

 as at present listed, are represented by 105 species of which 81 are at present only 

 known from the islands. The endemicity of the species is, according to M. Eugene 

 Simon, greater than that known in any other country. 



Of about forty families of spiders, 32 are altogether absent from the Hawaiian 

 fauna or are only represented by introduced or foreign forms. These latter are the 

 Sicanidae, Pholcidae, Clubionidae and Agelaenidae, and to these should probably be 

 added the Dysderidae. 



The endemic fauna is therefore probably confined to the families Theridiidae, 

 Argiopidae, Thomisidae, Lycosidae and Attidae, or five families only, so far as present 

 information is concerned. 



The Theridiidae are represented by five genera, none of them endemic, and one, 

 Teutana, is no doubt an introduction, while I suspect that Argyrodes comes under the 

 same category, one of its species being known to be foreign and the other probably is 

 so. The single species of Ulesanis is also subject to the same suspicion. Excluding 

 these we are left with a single remarkable species oi Ariamnes, and nine unquestionably 

 endemic species of Theridion, of which genus two introduced forms are present. 



