ACARINA FROM THE JUAN FERNANDEZ ISLANDS 573 
Epimera I-—II well chitinized, all probably with 3 pairs of hairs (the 
exact number of the hairs of epimera IJ and II I have not been able to see 
distinctly). 
The legs are very short and weakly chitinized, almost transparent. Tibize 
I and IV have a very long tactile hair. The femora are large and flattened 
(fig. 39). A very remarkable feature is that all the claws are broken off or 
more likely bitten off, since the animal was in other respects so well preserved 
that it cannot have been dead when it was collected. 

36 35 
Figs. 34—41. Cerocepheus mirabilis nov. gen. n. sp. 
34. Pseudostigmatic organ. 35. Top of rostrum with tips of mandibles. 36. Hypostome, dorsal 
view. 37. Mandibles. 38. Maxillary palp. 39. Leg II, inner view. 4o. Top of tarsus II. 
41. Top of tarsus I. 
Loc.: Juan Fernandez, Masatierra, Rabanal, c. 300 m.s.m., among dry 
leaves in dense forest, Aug. 1917. 2 specimens. 
Systematic position of Cerocepheus. 
When we try to form an idea about the affinity of the genus Cero- 
cepheus we are very forcibly reminded of two facts, one is that the present 
system of the Oribatei is almost exclusively build up on the basis of our know- 
ledge of the European forms, the other is that these form only a very small 
part of the Oribatei of the world and that, although quite a few genera seem 
37—29232. The Nat. Hist. of Juan Fernandez and Easter Ist. Vol. III. 
