Cahpentkk — The Aptcrygota of the Seychelles. 51 



Species with Allies in India and Ceylon (5). 



Lefidoc]irtus silvestris. . Heteronumcus longicornis. 



L. ohscuricornis. Gremastocephcdus iMllid^is. 



L. stramiiieus. 



Species with Allies in Malaya or Australia {'■]). 



Acrotelsa dongata Ne.anura sexoculata 



(Australia). Acanthurella Borncri 



(Malaya). 



Species with Allies in India, Malaya, ok Japan and in 

 Tropical America (2). 



Lcpidocam'pa fi-iahriatipes Cremast-occplialus Scotti 



(Malaya aiul America). (India, Japan, and America). 



No very definite conclusions can be drawn from the facts of distribution 

 just set forth, mainly because, with the incompleteness of our knowledge of 

 the distribution of tropical Apterygota, it would be unwise to lay stress on 

 negative evidence. Witli regard to the Seychelles archipelago itself, however, 

 the apparent absence of the Symphypleona, the more highly organized 

 sub-order of the CoUembola, and of all Poduridae except one species, is 

 noteworthy, indicating that the islands became separated from the great 

 continental tracts before the majority of genera belonging to those groups 

 had been able to spread far. A somewhat parallel case is afforded by the 

 Apterygote fauna of the Sandwich Islands, from which also the Symphypleona 

 seem to be absent, and the Arthropleona comprise only a single species of 

 Poduridae (see Carpenter, '04) belonging to the same tribe as the Seychellean 

 Neanura sexoculata, but to a more primitive genus, Protanura. It is note- 

 worthy, also, that the dominant genus of Arthropleona in tlie Hawaiian 

 archipelago, as in the Seychelles, is Lepidocyrtus, and that the other 

 CoUembola occurring in Hawaii are an Isotoma and two species of 

 Entomobrya. 



When the Apterygota of the Malagasy and Mascarene Islands shall have 

 been well worked, there will be doubtless recognized many more species with 

 affinity to Seychelles insects than the two mentioned above. The feature 

 that comes out from the analysis with some clearness is the establishment of 

 faunistie links between Africa, the Seychelles, and India ; the range of some 

 of the most remarkable of these, such as Lepidocampa and Cremastocephalus, 

 stretch as far west as South America, and as far east as Java and Japan. 



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