276 Acarology 



Genus: 



Rhynchohydracarus Lundblad, 1936 



Type. Rhynchohydracarus testiido Lundblad, 1936 



Figure 189 Rhynchohydracarus 

 testudo Lundblad, Dorsum. (After 

 Lundblad 1941) 



Figure 190 Rhynchohydracarus 

 testudo Lundblad. Venter. (After 

 Lundblad 1941) 



Hydrachnidae Leach, 1815 



Figures 191,192 



Diagnosis: The hydrachnids are mostly red, large, globular swim- 

 ming mites found in still water. Their skin has papillae and they pos- 

 sess paired eyes in capsules. The plates are of different sizes (excep- 



Figure 191 Hydrachna kenyensis 

 Lundblad. Dorsal plate. (After Lund- 

 blad 1942) 



Figure 192 Hydrachna kenyensis 

 Lundblad. Coxal plates. (After Lund- 

 blad 1942) 



tion: Anohydrachna) and shapes between the eyes. The coxal plates 

 are usually united in four groups of two each. There are no swimming 

 hairs on the legs and the tarsal claws are smooth and sickle-like. The 

 chelicerae are unsegmented and stylet-like. Movably linked in front 



