(dr. a. c. otjdemans). kew list of dutch acari , ir. 35 



The male is insufficiently figurea by Berlese (Ac. Myr. Scorp. 

 Ital., fase. 68, n°. 3); therefore I have tried to give a better 

 drawing of it. The shape of the animal is somewhat piriform, not 

 cylindrical (Fig. 66). The distribution, shape and relative length 

 of the hairs is exactly copied in fig. 66. The surface is scaly? 

 with large scales. The ejiistoma in all my males is bidentate (Fig. 63). 

 The ventral side (Fig. 67 j shows us two particularities, viz. the 

 right mandible bears a thumb-like process , directed forward and 

 inward, whilst the left one has a sharp mucro on its top , directed 

 outward; the mandibles are therefore asymmetrical. Further the 

 chitinous genital apparatus is asymmetrical too ; in all my males 

 it is shield-shaped, but oblique, inclining rightward. The horns 

 of the hi/postoma are uniarticulate, and bear a thumb-like appendage, 

 directed inward and ventrally (Fig. 65). The second pair of legs 

 is exactly figured by Berlese. Colour of the male yellowish-brown. 

 Length 960 ^. 



Female. Shape of the body like that of the male. Colour the 

 same. Length '1020 ^i, — Dorsal side perfectly that of the male. 

 Mandibles symmetrical ; horn of the hi/postoma (Fig, 64) uniarti- 

 culaie and without the characteristic thumb of the male. Epistoma 

 different, bidentate, or with a blunt middle-footh (Fig. 60 — 62). 

 The genital area (Fig. 68) proves that the species is a true Pa- 

 rasitus \ the epigynium or female genital shield is triangular, an- 

 teriorly pointed and, with the metasternalia , fits in an incision 

 of the sternal shield. But the shape of the chitinous skeleton of the 

 genital apparatus is aberrant and differs from that of all the other 

 Parasitidae (Fig, 68). 



Both males and females have on their left and right side a gland, 

 the opening of which is drawn in my fig. 66, and situated a little 

 before the line of demarcation between the two dorsal shields. This 

 gland secretes a fluid which coagulates in spirits. (Fig. 66). Probably 

 it has odoriferous properties and serves to repulse enemies. 



