ACARl 569 



is of an even width throughout and concave anteriorly. The 

 shields leave only a narrow band of finely striated cuticle along 

 the sides unprotected, from the shoulders backwards. The 

 length of the anterior shield is 500 y.. Its shoulders are well 

 set ofï ; in front of them the shield slopes downwards abruptly, 

 so that a narrow band along the anterior margin is set off, as 

 it were, as a distinct marginal shield ; at the extrême anterior 

 end of it a pair of short, stout bristles is inserted, closely 

 together (fig. 75 6). 



The posterior margin of the anterior shields projects slightly 

 in the middle ; the antero-lateral angles are rounded ; the pos- 

 terior edge is truncated between the two hairy bristles. 



The shields bear regularly placed hairs, which are of two 

 kinds, viz. ordinary setiform, slightly curved and pointed ones, 

 lying fiât and straight, more perpendieular, longer bristles 

 Avhich are of a uniform width throughout, and slightly plumose 

 at the top. Of the setiform hairs there are about 18 pairs on 

 the anterior, and 24 on the posterior shield, the position of 

 which is shown in figure 75 a. There are 4 pairs of bristles, 2 on 

 each shield, placed as follows : One pair, pointing straight 

 outwards and forward, inserted at the shoulders (« scapulares » 

 Berlese) ; one pair farther back and more inwards than the 

 former, at a distance af twice their length from them and poin- 

 ting in the same direction ; one pair at the posterior margin, 

 separated from each other by nearly twice their own length ; 

 between them the margin is perfectly straight ; and finally, 

 one pair in front of, and a little more latéral than, the former, 

 about the same distance from the latéral edge as from the 

 posterior bristle. 



Gnathosoma. Theeijistoma (fig. 76) is triangular, slightly 

 longer than it is wide at the base, with slightly concave sides, 

 smooth edges and finely pointed top. 



The mandibles (fig. 77) are of Laelapti7ie-ty]}e, with narrow 

 chela, of even width throughout. The upper jaw is much short- 

 er than the lower one ; it lias in the distal third 4 sharp, coni- 



