59. Anoplura (Siphunculata & Mallophaga) from Juan 
Fernandez Hosts. 
By 
GORDON B. THOMPSON (London). 
This brief report is based on material collected by Mr. (now Dr.) K. 
BACKSTROM during Professor C. SKOTTSBERG’s Expedition to Juan Fernandez 
in 1916—1917. In 1g19, the collection was handed over to a specialist who, 
however, never found time to attend to it. The material had been allowed to 
become dry and many of the corks had become dislodged from the tubes in 
the course of years. Recently the whole collection was entrusted to me for 
study through the kindness of Professor O. LUNDBLAD by Dr. RENE MALAISE 
on the understanding that I would do the best I could with it. As a result of 
the collection having been left unattended to for many years and the fact that 
I noticed several obvious errors in host data — for which Dr. Backstrom is 
not responsible — in the course of mounting it I have not felt justified in 
spending as much time on it as I would have gladly done had the collection 
been in better shape. Two species from the mainland of Chile have been 
included. In the following notes I have only given a skeleton bibliography of 
the species. 
Siphunculata. 
Haematopinidae. 
1. Polyplax spinulosa (Burmeister). 
Pediculus spinulosus Burmeister, 1839, Rhynchota, Genera Insectorum, No. 8. 
Polyplax spinulosa (Burmeister), FERRIS, 1923, Contrib. towards a Mon. Sucking Licé, 
2Ne pe 1887, 3f-| ng; r20/A5),/F, HH. 
Several males and females from Raétus rattus (L.), Masatierra, 23. 1V. 
IQI7. 
42— 38264. The Nat. Hist. of Juan Fernandez and Easter Isl. Vol. JI. 
