A. C. OUDEMANS, NOTES ON ACARI. 243 
little creature has real shields on its dorsum. (The minute pointsin 
my drawing represent the place of implantation of the umbrellas). 
Ventral side, (Fig. 16). Here I could not discern any 
segmentation, nor a demarcation of cephalothorax and abdomen, 
nor such of a prosoma and metasoma. Noticeable is the fact 
that (like in the other Pachygnathinae) the maxillae, the legs 
I and the legs II are so far remote from one another, whilst 
the coxae III and IV are contiguous. The genital ope- 
ning shut by two semi-oval valves, is enormous. The anus 
ditto. Both genital aperture and anus remind us in dimen- 
sions as well as in position, shape and mutual distance of 
the Oribatidae. Hairs; on the coxae I I could discern two 
very short hairs; on coxae II only one; on coxae III again 2 
and on coxae IV only one. Between coxae I I saw one pair 
af minute hairs; between coxae III again one pair (a little 
forward); between coxae IV two pairs; the genital opening 
is surrounded by 5 pairs, all directed over the covers. On the 
valves themselves you observe eleven pairs all directed toward 
the split. The anus is surrounded by five pairs of umbrellas 
which become more featherlike, the more they take a forward 
place. Finally you tell three umbrellas aside of the just men- 
tioned 5 pairs that surround the anus. 
Mandibles. As far I could discern, the mandibles are 
shaped like those of Sebaia rosacea (Tydschrift v. Entom. 
v 47, pl. 7, fig. 34). 
Maxillae. This species is very remarkable as it shows 
us in an unusual way that the maxillae are nothing but 
difformed legs. The coxae have united to form the underside 
of the head (I have drawn the so-called hypostome in fig. 18); 
the palps, which are the other articles together, show exact 
the same configuration and mutual dimensions as the legs I, 
nay even the tarsus of the palp bears a claw (fig. 19), rudi- 
mental though! The palps are not provided, however, with 
fan-, or feather-, or umbrella-shaped hairs. 
