298 C. SKOTTSBERG 



Chilopoda. 



+ Xesoj^fop/ii/iis laticpllis (Attems) Schubart (Geophilus, Verb.). Endemic. The 

 ^einis, wbicb has not been reported from S. America, includes after the latest revi- 

 sion by Airr.MS (as subgenus of Geopliilus) i i species (i SAV. Austral., i N. Zeal, 

 I X. Caled.. i An nam, 3 Jap. and 2 Eur.). 



r Xi'S(>o-i-()p/iiii(s biU-ckstrocini (Verb.) Schubart (Geophilus, Verb.). Endemic. 



Schizotoiia alaccr (Pocock) Silvestri. Chile, south to Fuegia, Argentina. A 

 genus of 6 s[)ecies (3 Chile and Argent, to Patag., Eueg., i E. Austral., 1 N. Zeal., 

 I Chatham Is.). 



Litliobio)>wyplia afyicaua Porat (Lamyctes insignis Pocock, insignisbaeckstroemi 

 X'erh.). Widely distributed over Africa; also Tristan da Cunha, St. Paul's I., 

 S.W. Australia and Hawaii. The genus very wide-ranging [N. Amer., W. Ind., 

 S. Amer. (also Chile), Afr., \\. Ind., Austral., Tasm., N. Zeal., Chatham Is., N. 

 Caled., Kermadec Is., Guam, Hawaii]. 



If we exclude the 4 species regarded, rightly I presume, as introduced with 

 the human traffic, 5 species remain, 3 of these endemic in Juan Eernandez. This 

 is indeed a very small number, but in spite of being so few, they tell a story of 

 an austral-circumpolar, presumably Antarcto-tertiary element. 



CoUembola. 



Of the 8 species distinguished by SciloTT [216), the first ever collected in 

 Juan PY'rnandez. 2 inhabit Chile, 3 are known from various parts of the world 

 and 3 endemic. As long as so little is known about the distribution of this group 

 it does not lend itself to zoogeographical speculations. The occurrence of widely 

 dispersed boreal species in S. America and other parts of the south hemisphere 

 (Australia, New Zealand etc.) is noteworthy, but whether their wdde range is due 

 to the great age of CoUembola or a result of later dispersal is unknown. 



Thysanura [222, 2pj). 



 Is(>U'pis))ia luiucctois Silvestri. — Mt, Mf. The specific epithet refers to the 

 intermediate position between IsolcpisDia and ll€tcrolcpis7>ia\ the species is com- 

 pared with forms known from Africa and Australia. 



' h KuscJielocliilis Ocliai:;aviac W'ygodz. — Mt. A monotypical endemic genus 

 related to Alloinacliilis and XesoniacJiilis from Australia, but not, as far as known, 

 to an American genus. 



Among the Invertel)rates treated above the endemic leech offers great in- 

 terest. Of Arachnoidea the Pseudoscorpionidea include a remarkable Antarcto- 

 tertiary element, whereas the true spiders, strangely enough, are quite disap- 

 pointing in this respect, even more so than the centipedes. 



Insecta. 



In order to get an idea of the zoogeography of the island insects I asked a 

 number of specialists for information on the general distribution of genera and 



