296 C. SKOTTSBERG 



Mtta uigrohumeraiis F. Cambr.— Mt, endemic? (see I.e. 430). The genus is 

 known from all continents. 



^Selkirkiclla alhoiruttata Berl. — Mt. The genus is related to the neotropical 

 G)iolus, known from Perii, l^razil and Chile, and appears not to be restricted to 

 Juan Fernandez; Hi:rl.\M) has seen a very closely related species from Valdivia 

 [22.A12). 



Miivs)naucheuius scg)>untatus Simon. Patagonia and Fuegia. — Mt. A genus 

 of 2 species, the second one from the Magellanian region. 



^ Misumoiops Sjoestedti Berl. — Mt. An American, especially X. American 

 genus. 



+ (uiycjma Skottsbergi l^erl. — Mt. A S. American, especially Chilean genus 

 of numerous species. 



(',. niaculaiipes Keyserl. Chile. — Mt. 



rOxysoma Delfini Simon. — Mt. A S. American genus. 



^ Plulisca or)iata Berl. — Mt. A subantarctic-magellanian genus extending north 

 into Chile. 



^/V/. iugeus Herl.— Mt. 



■r Lycosa I'CDiajidezi F. Cambr. — Mt. The genus is cosmopolitan. 



lii'oplirys quilpiioisis Simon. Centr. Chile. — Mt. The genus is known from 

 Centr. and S. America, ICuroj^e, S. Africa and Japan. 



Of the 19 species enumerated 13 or perhaps 14 are endemic in the islands; 

 15 (11 or 12 endemic) are restricted to Masatierra, 3 (2 endemic) to Masafuera 

 and a single Chilean species found on both islands. The only conclusion we can 

 draw from these figures is that most likely only a minor part of the spiders occur- 

 ring on the islands is known. It is quite possible that there is a marked differ- 

 ence between the two islands, but it is not probable that Masafuera is so poor 

 and that Santa Clara is devoid of spiders. Only a short visit was paid to this islet. 



The fauna makes the impression of being almost entirely neotropical or, at 

 least, S. American, with the exception of the two species of Macrargus, which 

 are of boreal parentage; of the doubtful /.^//^///^//r//;;/ nothing can be said. The 

 {)resence of a southern, eventually Antarctic element is indicated by MecysinaucJic- 

 )iiiis, possibly also by riiilisca, but so far there is no sign of a bicentric group. 

 \\ hethcr it can be distinguished in subantarctic America I cannot tell. 



Acarina. 



TR.'u;.\Kl)n [268) enumerates 28 species, of which 2 are cosmopolitan, the re- 

 mainder endemic. He points out that the collection, the first ever made in Juan Fer- 

 nandez, undoubtedly represents onl}' a small part of the acarofauna; this is evident 

 already from the fact that not a single sj^ecies came from Masafuera or Santa Clara. 

 Whether the cosmopolitan sj)ecies are late arrivals or not is impossible to tell, but 

 very likely they are. This would mean that the entire acarofauna is endemic, and 

 new investigations will not change its independent character unless some species 

 are discovered on the mainland. Of the 23 indigenous genera only one — probably 



