142 c. d. soar, description of two new species of water-mites. 



Description of Plates. 



Plate 12. 



Fig. 1. Arrhenurus Scourfieldi sp. nov. Dorsal surface of male 

 drawn from a living specimen, x 50. 

 2. Arrhenurus Scourfieldi sip. nov. Ventral surface of same 

 drawn after mounting. 



Plate 13. 



Fig. 1. Acercus longitarsus sp. nov. Dorsal surface of males, 

 X 58. 

 2. Acercus longitarsus sp. nov. Ventral surface of same, 



x 58. 

 3. Acercus longitarsus sp. nov. Palpi of same, X 150. 



Jovrn. Quelett Microscopical Club, Ser. ?, Vol. XII., Ho. 73, November 1913 



