(db. a. C. OUDBMÀNS). NEW LIST OF DUTCH ACARI, II, 21 



Like a tick the mite's capitulum was concealed under the free border 

 of a scale behind the left leg of the lizard. 



Finally my first-cousin, Dr, .1. T Oudemans , found in Amster- 

 dam, the 5th of November 1900, a third specimen on a caterpillar 

 of Saesia formicaeformis. 



Canestrim's description of his Bermauijssus llicJiardli don't fit 

 in the least with Hi/poaspis cossi; çvo\)d.\A^ \i\H Hypoaspis kramer il 



Hr/poasjns cossi (Ant. Dug) ?. The animal (Fig. 22) is oval in 

 shape, and somewhat shouldered. The dorsum is scaly and on 

 the posterior margin there are two hairs longer than the other 

 minute ones. The episioma (Fig. 23 and 24) has three cusps ; the 

 middle one ends into three teeth, the lateral ones into several. The 

 middle one or the lateral ones may be longer. The legs are all 

 about the length of tlie animal's body. All the tai'si show a distinct 

 division into two joints. 



The sternal shield (Fig. 25) is normal. The genital shield however 

 is peculiar ; it is almost piriform , with the truncated top turned 

 backward. The broad oval fore-piece is very thin and transparent 

 and spreads over the posterior margin of the sternal shield and over 

 the coxae of the 3d and 4th pair of legs. On lowering the tube of the 

 mikroskope we observe that the part of the genital shield (Fig. 26) 

 which is at the same level as the sternal shield, is triangular, 

 scaly, with top forward. The skin before this triangle is striated, 

 like in other Hypoaspis. There are two metasternal shields , each 

 bearing a hair. 



18. Hypoaspis hypudaei Oudms., nov. sp. 

 (With Plate 2, Fig. 27 and 28.) 



Length 448, breadth 224 .«. 



Colour very pale. 



Principal characters : the posterior mai'gin of the geniti-ventral 

 shield is not rounded, but nearly straight. The chitinous rings round 

 the places of implantation on the 2d, 3d and 4th legs project towards 



