ACARI 541 



upwards in the middle, tlius witli concave upper side, while 

 the ventral one has a médian projecting angle, at the top of 

 which one of the two hairs is placed. Trochanter on latéral view 

 almost quadrangiilar in outline (fig. 33), with one strong bristle 

 dorsally, in the middle, bent like a hook near the top, where 

 it has a smaller branch ; in front of the bristle, near the distal 

 margin, there is a low, rounded, knob-like tubercle. 



Fémur with short, distinctly demarcated basifemur ; the 

 articulation membrane between basifemur and trochanter 

 is vey well developed (fig. 32 b) on the dorsal side, with many 

 folds, which are visible when the leg is straightened ont ; 

 this feature, together with the dorsally obliquely cut-ofï top 

 of the trochanter, at once suggests that the ordinary position 

 of the fémur is one of being bent sharply backwards. 



Correspondingly to this feature the articulation membrane 

 between the fémur and genu is well developed ventrally (fig, 

 32 a), the top of the fémur being modified in sucli a way that 

 there is a thin collar-shaped portion in front ; behind this, 

 there is a thin, striated membrane with a deep pocket in which 

 the base of the genu is hidden when it is bent downwards 

 upon the fémur, consequently, pointing forwards. Tibia slightly 

 longer thangenu; tarsus longer than fémur (8 : 7), with very 

 short basifemur ; like the other joints plentifuUy provided 

 with setiform hairs, distally and dorsally with 4 to 5 longer 

 hairs, and a thick bunch of shorter, finger-shaped hyalin 

 sense-hairs. 



iîmbulacres (fig. 34) with long peduncle, almost three 

 times as long as the claws, and capable of being bent sharply 

 upwards in the middle. I hâve been unable to ascertain the 

 exact shape of the empodium, owing to its being folded up. 

 The supra-unguinal lobes seem, however, to be shorter than 

 the claws, and there appear to be no lanceolate subunguinal 

 slips. 



Legs II (fig. 35 a) are, as stated above, of a very characte- 

 ristic shape ; the trochanter has externally, in the middle, 



