556 



IVAR TRAGArDH 



The shape of the genital and anal shields is seen in fig. 2. They are of 

 equal length in the median line; the dividing line between them is not straight 

 but forms a blunt angle backwards. The genital shields have 4 pairs of small 

 hairs, and on the inner side of the anterior edge there are 5 very small hairs 

 in a dense row. The anal shields have 3 pairs of hairs. 



Loc: Juan Fernandez, Masatierra, among mosses and leaves. Numerous 

 specimens. 



2. Platynothrus Skottsbergii n. sp. — Figs. 7 — 10. 



Length of propodosoma 350 [jl, of hysterosoma 740 [x; width 780 [i. 

 Colour chestnut brown. 



7. Dorsal view. 8. 



Fig. 7 — 10. Platynothrus Skottsbergii n. sp. 



Tip of rostrum, with rostral hairs. 9. Pseudostigma and pseudostigmatic 

 organ. 10. Tarsus I. 



Texture (fig. 7) of propodosoma porous, with deep pores in the centre 

 of which the cuticle is very thin so that the light is let in and they appear 

 light under the microscope; the cuticle round these pores is very finely punctured, 

 the punctures being arranged in concentrical circles. The texture of the hyste- 

 rosoma is not so pronounced but of the same kind. 



Propodosoma as long as it is wide at the base; the lateral margins 

 distinctly concave on a level with and a little in front of legs I. The anterior 

 part of the rostrum (fig. 8) has a short, snout-like projection set off from the 

 rest by two deep incisions and carrying the two pointed, straight rostral hairs. 

 The whole structure resembles very much that described by the author in Platy- 

 nothrus peltifer (C. L. Koch) Trag. (compare Tragardh 1910, fig. 317, p. 533). 



The pseudostigmata (fig. 9) are placed on low, wart-shaped projections. 

 From these there are only very faint traces of any ridges running towards the 

 lamellar hairs. The latter are, however, inserted on the top of low, semisphae- 



