380 
the base of the sternum and a little more distant from each 
other than those of the posterior pair. — The anal plate is very 
small, considerably broader than long (without the branches), rounded 
on the sides sand broadly rounded behind, with two rather short 
and moderately thick branches somewhat removed from each other. 
Legs. They are moderately short and increase somewhat in 
length posteriorly (pl. II, fig. 5-b and 5 c).. The last pair is proxzi- 
mally "rather robust; the femur is even a little shorter than the 
trochanter, slightly longer than thick and a little shorter than the 
tibia, which is twice as long as thick. The tarsus is (in the male) 
nearly twice as long as the tibia and slender in its distal half. 
The hairs on coxa and trochanter are biramous with thin branches; 
the seta on the tibia is somewhat shorter than ihe joint. 
Copulatory Organs. It was impossible to examine them well 
without damaging the animal; they look short and very thick, cylin- 
drical near the base, distally strongly rounded with the end obtuse. 
Length. The adult male measures 1-12 mm. 
Locality.. Isl. Koh Chang (Gulf of Siam), under stones, 
Jan. 7. 1900 (Dr. Th. Mortensen leg.) ; 
Remarks. The shape of the styli and of the anal plate and the 
arrangement of the dorsal setæ on the anal segment show that this 
species is allied to the three preceding species and especially to 
P. danicus, but the thin cylindrical hairs on the head and the 
structure of the antennæ are aberrant and interesting. 
11. Pauropus modestus nm. sp. 
Pl. IV, fig. 23—2 4. 
Material. Only one immature specimen with eight pairs of 
legs has been examined, and it its therefore impossible to deseribe 
all the characters of the species as completely as I desire. 
Head. The distance between the eyes is slightly or perhaps 
not longer than an eye. — All the hairs are cylindrical and propor- 
tionately short; the outer pair in the second row is a little longer 
