10 



(l)K A. C. OUDEMANS). NOTES ON ACARI. 12 9 



11. Key to the species of Hypoaspis G. Can. 



Leg 2 in both sexes with spines. H. hermaphrodita (Beri. ) 

 Leg 2 without spines ... 2 

 ? ventral and anal shields fused. 3 

 ? ventral and anal shields 



separate 5 



\ Body elongate H. holaspidoides (G. Can.) 



' Body subcircular 4 



\ Body without hairs. . , . H. tumidulus (C.L.Koch.) 

 ' Body with long hairs on margin H. placentula (Beri.) 

 ' ? anal and ventral shields 

 touching with parallel edges 

 $ anal and ventral shields remote 8 

 ; Body round-oval, scarcely shoul • 



6. dered 7 



^ Body long-oval, well shouldered H. arcualis (C. L. Koch.) 

 „ ^ Body without hairs . . . . H. myrmecophilus (Beri.) 

 ' Body with marginal hairs. . H. canestrinii (Beri.) 

 I Dorsal shield with lateral 



8. j incision 9 



' Dorsal shield without incision 10 

 Q \ Body with minute hairs . . H. semiscissus (Beri.) 

 ' Body with long hairs . , . H. campestris (Beri.) 

 ^ Body red, nearly hairless . . H. lignicola (G. et R. Can.) 

 ' Body pale, yellow or brown, hairy, 1 1 

 ., i. Hairs club-shaped . . . . H. cuneifer (Michael). 



' Hairs otherwise 12 



.^ ( Hairs cultrate 13 



' Hairs usual 14 



[ Leg 2 in both sexes thicker 



13. , than 1, 3, 4 H. miles (Beri.) 



' Leg 2 not thicker . . . . H. pavidus (G. L. Koch). 



Hairs short 15 



Hairs long 19 



. e t Tarsus 4 with strong spines. H. aculeifer (G. Can.) 

 Tarsus 4 with hairs , . .16 



14 



