«3 



LINCOLNSHIRE FRESHWATER MITES. 



C. F. GKORGIi. M.R.C.S., 

 Kirtoit-iii - / .iniisey, I. in coin shire. 



Arrhenurus membranator, Sig.Thor. This sini^ular-lookini,'- 

 mite has been discovered since the publication of Dr. Piersisj;-\s 

 important work on the Hydrachnidaj, which purports to describe 

 all the known species of Freshwater Mites in the world up to 

 June 1901. It is fig-ured and described by Dr. Sig^. Thor in the 

 Zoolgischen Anaieger, No. 657-8, vom 25, November 1901. Place 

 of discoverv, Hemna.'s, Smaalenene, in Norwav. On iith JuK^ 



Arrhenurus membranator. i, upper; 3, under surface of iii.tI: 

 4, under; 5, upper surface of female. 



snd of tail 



1902, whilst visiting with my brother at North Thoresbv 

 (between Grimsby and Louth, Lincolnshire), I took two speci- 

 mens, a male and a female. S'lg. Thor does not mention the 

 female, from which I gather he has not met with that sex. 

 I am, therefore, fortunate in being able to give a figure, as 

 probably no drawing or description has been previously pub- 

 lished. F'ig. I represents the upper and Fig. 3 the under 

 surface of the male mite ; the legs are not figured, they are 

 of the usual type, and the fourth internode of the fourth leg 

 carries the peculiar spur found on so many of the males of this 

 family. 



1903 March 2. 



