ACARINA FROM THE JUAN FERNANDEZ ISLANDS 625 
Although I am inclined to believe that the establishing of a distinct genus 
or subgenus for those Se/austium-like forms which have no nose at the anterior 
end of the propodosoma, I think it is better to defer this until the extra- 
european forms are better known than what is hitherto the case. 
This genus (or subgenus) would also include -rythreus antarcticus TRA- 
GARDH from Falkland Islands (1907, p. 25—26, figs. 48—52) which, as a matter 
of fact, is very closely related to B. obtusum, but easily distinguished by the 
different proportions of the joints of the legs. 

Figs. 163—166. Belaustium obtusum n. sp. 
163. Outline of the body. 164. Propodosoma. 165. Maxillary palp, seen from the inner side. 
166. Tarsus I and top of tibia. 
Length 1080 uw, width 720 », width of propodosoma 450 »p. 
Colour unknown owing to the discoloration due to the preserving fluid. 
Shape (fig. 163) broadly rounded, the greatest width being at the shoul. 
ders, which are set off from the propodosoma by incisions; posterior margin 
obtusely rounded. 
Texture finely transversally wrinkled or striated; the cuticle of the palps 
and of the legs, which in &. antarcticum is more strongly chitinized and has 
numerous pores, is in B. odtusum quite hyalin, without any pores. 
The hairs of the body are simple, setiform and slightly curved. 
Propodosoma (fig. 164) small, triangular, half as long as it is wide, an- 
terior margin rounded, the sides with a small incision from which a transverse 
