ACARI 591 



tiire, the ciiticle being finely punctvired ; it extends forwards 

 only a little beyond the middle of coxae II, with truncated 

 edgo ; posteriorly it extends to the middle of coxae IV, tape - 

 ring shghtly towards the back, with rounded posterior end ; 

 4 pairs of small latéral hairs, placed as follows, one on a level 

 with the middle of c o x a e II ; one a little in front of a hne drawn 

 between coxae II and III ; one a httle behind the middle of 

 coxae m ;and one pair on a level with the anterior side of 

 coxae IV. Farther back, on a level ^\^th the posterior side 

 of coxae IV, another pair. 



Behind coxae IV there is an irregular, narrow, transverse 

 ridge, extending lateraUy on a level with the distal margin of 

 coxae IV. In front of, and a the backof, the sternal shield, 

 as well as at the sides ofthe ventral shield the cuticle is 

 finely stria ced, with regularly wavy striae. 



Ventral shield large, triangular ; top backwards, with 

 rounded angles, and almost one and a half times as long as it 

 is wide. It has 3 pairs of small hairs, one pair at the anterior, 

 two at the latéral margin. 



At the anal aperture there is an adhesion-apparatus, 

 or rather the anal aperture with the surrounding parts of 

 the cuticle is modified into an apparatus that does duty for 

 that purpose. The exact structure is not very easy of being 

 discerned, the apparatus being retracted in ail my spécimens. 

 It appears to be co.mposed of the foUowing parts (fig. 114) : a 

 subquadrangular plate which surrounds the anal aperture, 

 and whose posterior margin is dentate ; this bears two pairs 

 of flexible hairs of equal size, one pair close to the anal aperture, 

 on a level with its middle ; the other pair more latérally, near 

 the posterior margin. This plate is capable of being telescoped 

 into a narrow, hoop-shaped plate, which latter can itself be 

 telescoped for half its own length within a large subconical 

 plate. 



To the margin of the hoop-shaped plate there are attached 

 the two branches — one ventral, one dorsal — of two interior, 



