DERIVATION OF THE FLORA AND FAUNA 299 



Species. For their readiness to supply me with the necessary data I am much 

 obhged to Dr. Olof Ahlberg, Stockholm (Thysanoptera), Dr. KjELL Ander, 

 Linkoping (Orthoptera), Dr. Per Brinck, Lund (Coleoptera), Mr. Nils Bruce, 

 Gardby (Coleoptera), Dr. Lars Brundin, Stockholm (Coleoptera), Mr. Felix Bryk, 

 Stockholm (Lepidoptera), Dr. W. E. China, London (Hemiptera), Dr. K.-H. FoRSS- 

 LUND, Stockholm (Trichoptera), Dr. G. J. Kerrich, London (Hymenoptera), Dr. 

 K. Princis, Lund (Orthoptera), Mr. Bo Tjeder, Falun (Neuroptera) and Dr. 

 B. P. UVAR(3V, London (Orthoptera). 



JOHOW (ijo) enumerates 26 species of insects from Juan Fernandez; some finds 

 may, I presume, have escaped his notice, but probably not many, and it is evident 

 that the entomofauna was very little known at that time. During our survey 19 16-17 

 a fair number of insects were collected and many novelties were described in vol. 

 3 of this work, but the collection gave the impression of being very fragmentary. 

 The intense collecting undertaken in 195 i and 1952 by the Rev. Dr. GuiLLERMO 

 KUSCHEL revealed, however, the existence in the islands of a surprisingly rich 

 and varied insect world. As Dr. ALEXANDER, the wellknown specialist on Tipu- 

 lidae, expresses himself (^.35): "Father Kuschel's collecting has completely 

 revolutionized our knowledge of the insect fauna of the islands in many groups, in- 

 cluding the crane-flies" — only 3 species were known, the number now amounts to 37. 



Until now only a part of Dr. Kusciiel's large material has been worked up 

 by specialists, and I can only refer to what has been published (142, 208, 2g2, 

 2gj, jog, 314), but for some groups we now have sufficient data to form an 

 opinion of the zoogeographical position of the islands as far as the insects go. At 

 the end of 1954 Dr. KusCHEL joined my new expedition to the islands and brought 

 back a third very large collection. When all his material has been studied, the insect 

 fauna of Juan Fernandez will be better known than that of most isolated islands. At 

 present about 340 indigenous species have been recorded, of which about 230(70 %) 

 are regarded as endemic. Dr. KuscHEL (letter, Oct. 16, 1955) calculates that of 

 a total of about 600 species collected by him, about 360 still await publication- 

 Among them are 25-30 flies, probably over 50 butterflies, many endemic, at 

 least 180 beetles (more than 120 weevils, of which 4 have been introduced 

 accidentally, the remainder being endemic), and some 40 hymenopters. 



Orthoptera. 

 Dermaptera [22j). 



+ Euborellia annulipes (Lucas). — Mt, SC, Mf. The genus S. Amer., E. Afr., 

 Orient, Ind., Ceylon, Tasm. 



Anisolabis Bormansi Scudd. Galapagos Is., Easter I.— Mt. A large genus of 

 world-wide distribution. 



Saltatoria [j8, 22j). 



^Hoplospyriuin Skottsbergi Chopard.— Mt. An American genus, the species 

 related to species from N. America and Chile. 



Trimeroiropis ochraceipeimis Blanch. Chile.— Mt. The genus is American. 



