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ward ; rounded posteriory. The whole dorsal side is protected by 

 a shield which shows only a line of deuiarcation between the 

 two shields. Only before the shoulders a uarrow margin is un- 

 protected, and here the distal ends of the peritrema are visible. 

 There are 4 vertical hairs, and two enormons shoulder-bristles, 

 oue on each shoulder. Further the dorsuni has 8 transverse irre- 

 gular rows of souiewhat curved bristles, and the margin of the 

 posterior dorsal shield is provided with bristles too. All the bristles 

 are smooth, don't show the hairy distal end of those of the nympba. 



The ventrai side (Fig. 9) shows us that all the shields have 

 coalesced. Even the ventrai and dorsal shields have fused on the 

 sides of the auimal. Behind the postanal hair the cribrate portion 

 is present. 



Epistoma (Fig. 8 and 10). In one individual the epistoma is 

 tridentate, in the other the lateral cusps lack, and the centre 

 has an appendage in top (probably a monstrosity). 



Mandibles (Fig. 11 and 12). The upper (fixed) finger was in 

 both individuals the satue, longer than the movable one, with a 

 denticulated dog-tooth and two incisors. The movable finger is 

 broad and provided with au oblong foramen ; in one instance its 

 distal end was blunt; in the other individual its distal end is 

 distinctly crooked. It seems to me that the so called movable 

 finger is a fusion of a real movable finger and an appendage or 

 copulation organ, as we find iu Cyrtolaelaps, Laelaps, Hypoaspis, 

 Liponyssus and other Parasitidae, and that only in this way the 

 foramen in the so-called movable finger is explicable. 



The maxillae (hypostoma) (Fig. 9) have horns on short peduncles. 

 Berlese would call them »biarticulate". The inner malae have 

 fused, form a median, well-chitinized, truncated base, ending in 

 membranes of the shape like in the nympha. The palps show the 

 following particulars: the lst joint (trochanter) (Fig. 8) shows 

 sharp side-edges aud ventrally (Fig. 13) a strong thorn, which 

 is directed inward, touching almost the top of the maxillar horns 

 (Fig. 9). The 2d joint (femur) has inward a sharp edge (Fig. 8). 



The leg s. The legs are slender and long, except those of the 



