HydracJmellae 



297 



Limnesiidae Thor, 1900 



Figures 227, 228 



Diagnosis: Usually weakly skinned, the body of these mites is smooth, 

 has no papillae, and is seldom entirely armored. A small, unpaired 



Figure 227 Centrolimnesia bondi Lundblad. Leg ill (left), leg iv (right) (After 

 Lundblad 1935) 



\ 



shield, or two shields, is located posteriorly on the dorsum. Lateral 

 eyes are separated from one another and lie singly. The palpal femur 

 usually has a peg or small spine 

 on the inner side while the palpal 

 tibia has a small seta on the inner 

 side. The coxal plates are arranged 

 in four groups of two each and 

 are seldom united into one group; 

 coxal plates iv are large and tri- 

 angular with the acetabula on the 

 posterior lateral edge. The legs 

 usually have swimming hairs and 

 tarsi IV as a rule are reduced and 

 lack claws. The genital organ is 

 close to the coxal plates; the geni- 

 tal plates have three, but seldom 

 four or more suckers. In the male 



the genital plates are united with V^Zl!^^ Centrolimnesia bondi 



^ ^ Lundblad. Venter of male. (After 



one another. Lundblad 1935) 



