(dr. 4. C. OUDEMANS). NEW LIST OE DUTCH ACARI, II. 23 



I have found only one female. 



The dorsal side (Fig. 29) shows one dorsal shield with two inner 

 longiludinal rows of setae of different length, two outer longitudinal 

 underbroken rows, and a continuous marginal row. On the posterior 

 margin there are two long hairs. The body itself shows marginal 

 hairs too, of which two long ones stand on its posterior margin. 



The ejnstoina is short , sharply pointed. 



The palpi and the legs are very Celeripes-Wke , being short, 

 haevy and provided with stiff bristles. All the legs have enormously 

 developed ambulacra. The tarsi of the second pair moreover end 

 in two spines. The tarsi of the first pair of legs bear two , those 

 of the other legs only one tactile hair. The tarsi of the 2d , 3d 

 and 4th pairs of legs are distinctly divided into two joints. 



The ventral side (Fig. 30) shows a sternal shield with 6 bristles, 

 an oblong genital shield with two bristles and which becomes 

 inconspicuous forward, a striated part of skin before this shield, 

 and an anal shield. The coxae are all provided with a short 

 chitinous carina , resembling a spine. The venter is provided with 

 setae of different length. 



The species is closely allied to Hypoaspis krameri G. et R. Can., 

 differs from it by its thick legs. 



21. Key to the species of Hypoaspis 



Can. 



I 2d leg in both sexes with spurs . .H. hermaphrodita Beri. 



I 2d leg without spurs 2 



[ ? ventral and anal shields fused . .3 

 / Î ventral and anal shields separate .5 

 g ( Body elongate ...... .H. holostaspoides G. Can. 



I Body subcircular 4 



j Body without hairs H. tumidulus (C. L. Koch). 



\ Body with long hairs on margin . .H. placentula Beri. 



I? anal and ventral shields contiguous, 

 touching with parallel lines . .6 

 Î anal and ventral shields remote .8 



