572 



DR. W. A. CUNNINGTON ON THE 



Hydrachnida. 



It is probable that the Hydi-achaida of the great African lakes 

 are but imperfectly known to science, although 31 species in all 

 have been enumerated. Comparatively small and inconspicuous 

 forms as these mites are, there seems little doubt that a good 

 many more species will come to light in the future. Following 

 on the earliest collections made by Stuhlmann, come those of 

 Flilleborn in and around Nyasa and of Borgert in Victoria 

 ISTyanza. Specimens from both those lakes and also from Tan- 

 ganyika were obtained by the expedition which I conducted 

 in 1904-05. It seems likely that Lake Nyasa, from which 

 the largest number of types (14) is on record, has been better 

 explored in this direction than the remaining lakes. ISTo 

 Hydrachnids have hitherto been collecteil in either Albert 

 Nyanza or Kivu. 



Table of Distribution of Hydrachnida t. 



t For additional information refer to Daday (76, p. 237) and Soar (172). 



§ Not actually recorded from the lake itself, but from within its drainage area. 



