A. C. OUDEMANS. ACARI. 125 



enormously developed metapodial shields fused. The peritrematic shields narrow, only discernible 

 internally of the peritremata ; behind the stigmata the démarcation of thèse shields and the 

 metapodial ones is discernible. The metapodial shields, enormously developed, extending 

 backward till the level of the anus, extending forward, externally of the peritremata along 

 their whole length; their internai edge concave, almost parallel to the external edges of the 

 ventral and anal shields; their external edges forming the edges of the body; provided with 

 a row of 9 marginal hairs and about 8 metapodial hairs. Stigma rather large, on the usual 

 place. Peritrema middle-sized, extending forward beyond the implantation of legs I, not 

 becoming dorsal, rather wide, dark brown-coloured. 



Epistoma (Fig. 24) distinctly demarcate from the bases of the palps, smooth, without 

 any markings, anteriorly triangular with smooth scarcely convex edges, ending in a strong 

 chitinous mucro ; the free anterior part is interiorly provided with a crest. No styli! 



Mandibles short, when retracted not extending backward beyond the anterior edge of 

 the sternal shield. When we consider the sheath as a coxo-trochanter, the fémur is short 

 and distinctly articulate with the so-called clielae (see fig. 28); thèse chelae then must repres- 

 ent the genu, tibia and tarsus. There is, I think, reason enough to consider the base of the 

 chelae as a fusion of genu and tibia (see the following species). BORNER considers the base 

 of the chelae only as a tibia, and adopting the upper jaw as a basitarsus, he calls the im- 

 movable pièce tibiotarsus. I will call the base genutibia. Then this genutibia is provided on 

 its internai side (Fig. 28) with the following appendages : 1. a lanceolate transparent mem- 

 brane near the condylus of the lovver jaw, and attached to the genutibia along its whole 

 length ; its free edge is smooth ; 2. a second ditto a little more posterior and dorsal to the 

 former; 3. a third ditto, wider and with serrate free edge, a little more dorsal and anterior 

 to the former; 4. two much longer and narrower ones, finely fringed and attached on the 

 same Une, extending far more forward, being attached in their anterior half on the upper 

 jaw; finally 5. a long radula (as called by THORELL) extending along the whole upper jaw 

 and even beyond its anterior incisor. (This radula is better drawn by me in the following 

 species). Most probably thèse membranes are sense-organs, whilst the radula seems to serve 

 to rasp the food. Above the mandible (see S in my drawing) there is a sense-organ, attached 

 to the distal end of the tibia, but this sense-organ is on the external side of the tibia. I hâve 

 delineated it apart (see my fig. 30); it is knife shaped, curve and wide, its dorsal edge blunt. 

 its ventral edge sharp. Very distinct is the démarcation of the tibia and the basitarsus (upper 

 jaw). This upper jaw (Fig. 29) has a large end-incisor, behind which a smaller one is visible, 

 followed by a little hole without sense-organ. Then follow 7 canines, four smaller ones, than a larger 

 one, followed by a smaller and a larger one. Thèse are followed by three larger and one smaller 

 triangular molars. The lovver jaw or telotarsus has only one incisor, 7 small canines and one larder 

 one, ail directed backward, and three small molars and one larger one, ail directed backward. 

 Moreover it is provided on its internai side (Fig. 28) with an anterior singularly folded extremelv 

 thin, transparent membrane with serrate edge, followed by three feather-like sense-organs (?), 

 and a little before the strong angulus mandibuli (Fig. 29) a row of 7 minute triangular transparent 

 membranaceous teeth. Pulvillum (Fig. 28) a double folded comb-shaped membrane with about 

 10 teeth. Behind the pulvillum a sharply pointed membranaceous appendage. (Fig. 31 shows 

 the anterior membranaceous appendage of the lower jaw with a ventral aspect). 



