(dr. a. C. OUDEMANS). new list of DUTCU acari , II. 39 



M. Parasitus wasmanni Oudms., nov. sp 

 (With Plate 5, fig. 87 and 88). 



Only the 2 is known to me. It is found by Mr. Eric Wasmann, 

 S. J., in a nest of Formica sanguinea Latr., in the neighbourhood 

 of Exaeten near Roermond (Limburg), 



Colour brown; Length 570 ,«. ; stature strongly remembering 

 that of Parasitus loiigulus (C. L Koch). It differs, however, from 

 it by its epistoma being bidentate and incised between the two 

 cusps, and by the genital shield showing a chitinous armature 

 slightly different from that of P. longidus. I have delineated the Î in 

 fig. 87 and its genital apparatus in fig. 88. 



45. Parasitus septentrionalis Oudms,, nov. sp. 

 (With Plate 5, fig. 89—93). 



A large species. The male measures 1440, the female 1590 ^. — 

 Colour yellowish-brown. 



There is only one dorsal shield, both in the males and females 

 (Fig. 89). The fore-half has 4 transversal rows of two hairs each 

 and three rows of six hairs each, the hind-half at least six rows 

 of at least ten hairs each. 



The epistoma of male and female is beautiful, crownlike, with 

 5 spines. The 1st and 4th legs are longer than, the 2d and 3d 

 legs as long as the body. The second leg has a femur with two 

 tubercles on its distal end , a genu with 3 crooked tubercles on 

 its distal end, a tibia with a strongly chitinized spine, curved 

 inward and backward. Fig. 90 and 91 are two 2d legs viewed 

 in different directions. The tarsus is distinctly divided into two 

 joints, a proximal smaller and a distal longer one. The proximal 

 joint is flexed like a knee. 



Fig. 92 is the ventral side of the male, showing cornicula la- 

 biales biarticulata. 



Fig. 93 is the ventral side of the female, showing the form of 



