[91] 



©n tbe palpi of jftesb^Mater /DMtes as m^5 to 

 DtsttnoutsbittQ Sub^jfamiUes* 



By C. F. George, M.R.C.S., Lon., etc. 



SECOND PAPER. 



THE Second Family of the Fresh- Water Mites, Weihermilben 

 or Hydrachnides, is divided into five sub-famiUes, viz. — 

 I, Lim7iesia; 2, Hydrachna ; 3, Hydryphantes ; 4, Hydrodroina ; 

 and, 5, Eylais^ distinguished by having four eyes, whilst the Hygro- 

 batides have but two. If the following figures are examined and 

 compared, they will be found to differ from each other, and also 

 from the figures given with the previous paper,* with the exception 

 of Limtiesia (Fig. i), where this organ resembles very closely that 

 of Hygrobates amongst the Flussmilben. In Fig. 2 the joints are 

 very wide in proportion to their length, and the movable claw 

 carried on the upper surface of the last joint is very remarkable, 







more so than I have been able to demonstrate in the figure. In 

 Hydrypha7ites (Fig. 3) the organ is small for the size of the mite, 

 and carries the small movable claw beneath the last joint, the 

 upper portion of which projects in the form of a sharp point. 

 In Hydrodroina (Fig. 4) there appears to be two claws, or else 



* See "Journal of the Postal Microscopical Society," vol. II., p. 73. 



