570 IVAR TRAGARDH 
of the proximal joint. In /lateremeus, on the other hand, the socket is found 
at the proximal end of the distal joint, which embraces the distal end of the 
proximal joint which is accordingly narrow. This applies to the articulation 
between femur and genu, genu and tibia and tibia and tarsus. The femora 
are more or less clavate, the genua very short, the tibie long and of uniform 
width, the tarsi short. The claws are fairly large, of uniform size and attached 
to a slender peduncle (fig. 31). 
Loc.: Juan Fernandez, Masatierra, among dry leaves, 16. 8. 1917. 







10 o 
0006960 S 



QO MD 
WE 09S 098 8G GS FE 
Sse CLO SUS e 
Figs. 23—31. Plateremceus vestitus n. sp. 
23. Hypostome, maxillz and left palp. 24. Top of tarsus with waxy secretion. 25. Pseudo- 
stigmatic organ. 26. Slit in the dorsal shield. 27. Chela mandibuli. 28. Articulation between 
tibia and tarsus IV, 29. Articulation between femur and genu III. 30. Articulation between 
genu and tibia II]. 31. Claws and peduncle. 
Cerocepheus nov. gen. 
One cannot doubt that when the acaride fauna of the tropics will be 
better explored than it is at the present time, quite a lot of new genera will 
be discovered and the old system which is built up largely on european forms 
will be greatly altered. Thanks to JACOBSON’s extensive collections on Java 
and to JEANNELS’ collection from Africa described by BERLESE as well as OUDE- 
MAN’s and y. VITZTHUM’'s last papers we have got a fairly good idea of how 
rich the acaride fauna of the tropics is, and what remarkable forms still await 
their discovery. 
