44 (dr. a. c. oudemans) new list or dutch acari , ii. 



a meshwork (fig. 106). The two vertical hairs are featherlike and 

 short. Behind the vertical hairs tliere are two light-refracting thick 

 curved hairs, and further there are four segmental rows of eight 

 hairs each, one of six, two of four and one of two hairs. 



The eplstoma (^Fig. 108) strongly resembles that of the male. 

 Yet I am doubting of the fact whether the median bifurcate ap- 

 pendage is planted on the base of the fish-tail-shaped lip, or if the 

 lip itself is bifid, like that of M. marginatus , pisenttl, terreus, etc. 



The second leg bears, on the femur a hyalin process, and on the 

 tibia a hyalin ßat spine (Fig. 106). 



On the ventral side we observe (Fig. 107) the beautiful markings 

 of the sternal shield , the sub-pentagonal , nsarly semicircular genital 

 shield, and an enormous venlri-anal shield, with a perfectly round 

 anus. 



52. Key to the species of Macrocheles (Lair.) 



Epistema with long spine , . .M. longulus (Beri ) 



Epistema otherwise 2 



Epistema with rhomboid lip, ending 



in a long spine iVI. longispinosus (Kram.) 



Epistema with more or less fish- 

 tail-shaped lip, with a median 

 bifurcate appendage ... .3 



Femur 3 with knife-like hair on 

 posterior side. Epistoma : lip 

 ^- [ deeply split ; each half of fish- 

 tail usual M. marginatus (Herm.) 



Femur 3 without such hair. . .4 



Vertical and body-hairs usual brist- 

 les. Epistoma : fish-tail deeply 

 split; each half of fish-tail bi- 

 furcate IVI. pisentii (Beri.) 



"Vertical and body-hairs for the grea- 

 ter part feathered 5 



