ACARI 543 



the middle, whicli is inserted at the top of a low ridge, rising 

 gradually forwards ; this bristle is swollen at the base, finely 

 pointed, and pressed close to the tarsus. 



The ambulacres (fig. 35 c) differ from those of legs I ; 

 the peduncle is shorter, the supraunguinal lobe is slightly 

 longer tlian the claws, and there is a pair of subunguinal, 

 lanceolate, pointed slips. 



Female. 



Epistoma tricuspidate, asin the maie (fig. 36), but médian 

 mucro very slender and thin, being six times as long as it is 

 wide at the base, and not bent downwards at the top ; latéral 

 cusps longer than in the maie, being half as long as the médian 

 one, and twice as long as they are wide at the base. 



Mandibles (fig. 37). Lower jaw, as usual, shorter than the 

 upper one, with large terminal tooth which, when the chela is 

 closed, almost reaches the dorsal edge of the upper jaw ; in the 

 distal two fifths with 3 teeth, the anterior one of which is very 

 small, while the posterior one is twice as long and wide at the 

 base as the médian one. Upper jaw with terminal tooth slightly 

 larger than that of the lower jaw ; one small tooth in front of, 

 and another at the back of, the lower terminal tooth ; one at 

 the back of the subterminal lower tooth, on a level with which 

 pilus dentariusis inserted ; opposite the posterior lower 

 tooth 5 small, closely set teeth; pilus basalis submarginally, 

 behind the dorsal incision. 



Hypostoma (fig. 31). Maxillary lobes larger than in the 

 maie (compare figs. 30 et 31); maxillary plates without 

 fringes in the distal half, which is narrower than in the maie ; 

 fringed part only half as long as in the maie, and instead 

 of the detached dentate blade, there is a thin membrane with 

 convex edge, as long as the fringed part, and not half as high 

 as it is wide at the base. 



Ventral side without any peculiar characteristics, except 

 that the latéral edges of the epigynial shield hâve a pair of 



