161 
The sole breach in a plain row according to these 
characters is made of Charon and Catageus, the first 
have 4-jointed tibia and 1-jointed claw on the palpi, the 
latter having 3-jointed tibia, but 2-jointed claw on the 
palpi. I have considered the division of the claw of 
the palpi as a more important character than the number 
of joints in the hind tibia. 
it may as yet be pointed out that in the forms 
known to me there is found an oblique, clear stripe on 
each side of the last joint of the tarsi (fig. 15, b), and 
that a clear, longitudinal furrow (fig. 15, c) on each 
side of the last joint limits the narrow dorsal part, 
which as a free process prolongates itself over the 
insertion of the claws. 
E. Specific Characters. 
Most of the species are very badly described, and 
probably it always will be impossible to recognize 
several of them. In trying to determine the material of 
our Zoological Museum, I perceived that no author 
has undertaken the closer examination of the great 
variability, which in several external structures and dimen- 
sions, according to the size of the animal, asserts itself 
in the same species; I likewise found on a comparatively 
good material of several of the species of the genus 
Admetus a couple of specific characters, the one of 
which appears to be new. In most of the species there 
is found below the ‘centre of the anterior margin of the 
cephalothoracic shield a process, which I shall call 
the frontal process. This process proceeds in Adm. 
palmatus Hbst a little behind the anterior margin of 
the cephalothoracic shield from its lower side and is 
chiefly directed forward as a rather small cone. In a 
not described species of Admetus from Venezuela it 
looks like, as if the frontal margin were flexed down- 
Entom. Medd 4 B. 11 
